FAILURE MAP
← Case archive

FA-77446 / Legal deadline computation / Open access

Timeliness of a filing timestamp against a local deadline: paper rule · case 01

A paper filing handed in after the clerk office closed on the deadline day is marked timely.

Verified by executionVariant 1 · 7 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Paper filings are given the electronic midnight rule.

VERIFIED REPAIR

At the paper rule decision use `local.date() < dl or (local.date() == dl and local.time() < close)`, leaving the other decision sites of the model unchanged.

Unsuccessful approach: The partial repair `local.date() < dl or (local.date() == dl and local.time() <= close)` accepts a paper filing at the exact closing time.

Case contract

The filing timestamp is ISO 8601 with Z or an explicit UTC offset. The court is at offset_min minutes east of UTC (local = UTC + offset). Electronic filing is timely through local midnight ending the deadline day (any time on the deadline date). Paper filing on the deadline day is timely only strictly before the clerk office closing time. Earlier dates are timely. Return [timely, local time ISO to the second].

Why this case matters

Docketing systems compute filing and response deadlines from trigger events; a wrong date can forfeit a right.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json
import datetime as dt
import calendar
N = 1
observations = []
def solve(filed, deadline, offset_min, method, office_close):
    u = dt.datetime.fromisoformat(filed.replace('Z', '+00:00')).astimezone(dt.timezone.utc).replace(tzinfo=None)
    local = u + dt.timedelta(minutes=offset_min)
    dl = dt.date.fromisoformat(deadline)
    if method == 'electronic':
        timely = local.date() <= dl
    else:
        close = dt.time.fromisoformat(office_close)
        timely = local.date() <= dl
    return [timely, local.isoformat(timespec='seconds')]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: west zone late evening',
   ['2024-03-06T04:30:00Z', '2024-03-05', -300, 'electronic', '17:00'],
   [True, '2024-03-05T23:30:00']),
  ('east zone after midnight',
   ['2024-03-05T22:30:00Z', '2024-03-05', 120, 'electronic', '17:00'],
   [False, '2024-03-06T00:30:00']),
  ('explicit offset stamp',
   ['2024-03-05T23:30:00-05:00', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T04:30:00']),
  ('last second electronic',
   ['2024-03-05T23:59:30Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T23:59:30']),
  ('deadline day morning',
   ['2024-03-05T09:00:00Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T09:00:00']),
  ('paper after close',
   ['2024-03-05T17:30:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [False, '2024-03-05T17:30:00']),
  ('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00'])],
 [('explicit offset stamp',
   ['2024-03-05T23:30:00-05:00', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T04:30:00']),
  ('last second electronic',
   ['2024-03-05T23:59:30Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T23:59:30']),
  ('deadline day morning',
   ['2024-03-05T09:00:00Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T09:00:00']),
  ('paper after close',
   ['2024-03-05T17:30:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [False, '2024-03-05T17:30:00']),
  ('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00']),
  ('paper before close offset',
   ['2024-03-05T14:00:00+02:00', '2024-03-05', 60, 'paper', '16:30'],
   [True, '2024-03-05T13:00:00']),
  ('paper previous day evening',
   ['2024-03-04T21:00:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [True, '2024-03-04T21:00:00'])],
 [('deadline day morning',
   ['2024-03-05T09:00:00Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T09:00:00']),
  ('paper after close',
   ['2024-03-05T17:30:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [False, '2024-03-05T17:30:00']),
  ('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00']),
  ('paper before close offset',
   ['2024-03-05T14:00:00+02:00', '2024-03-05', 60, 'paper', '16:30'],
   [True, '2024-03-05T13:00:00']),
  ('paper previous day evening',
   ['2024-03-04T21:00:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [True, '2024-03-04T21:00:00']),
  ('electronic next day',
   ['2024-03-06T00:00:01Z', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T00:00:01']),
  ('offset stamp plus zone',
   ['2024-03-06T01:15:00+01:00', '2024-03-05', -60, 'electronic', '17:00'],
   [True, '2024-03-05T23:15:00'])],
 [('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00']),
  ('paper before close offset',
   ['2024-03-05T14:00:00+02:00', '2024-03-05', 60, 'paper', '16:30'],
   [True, '2024-03-05T13:00:00']),
  ('paper previous day evening',
   ['2024-03-04T21:00:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [True, '2024-03-04T21:00:00']),
  ('electronic next day',
   ['2024-03-06T00:00:01Z', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T00:00:01']),
  ('offset stamp plus zone',
   ['2024-03-06T01:15:00+01:00', '2024-03-05', -60, 'electronic', '17:00'],
   [True, '2024-03-05T23:15:00']),
  ('regression: west zone late evening',
   ['2024-03-06T04:30:00Z', '2024-03-05', -300, 'electronic', '17:00'],
   [True, '2024-03-05T23:30:00']),
  ('east zone after midnight',
   ['2024-03-05T22:30:00Z', '2024-03-05', 120, 'electronic', '17:00'],
   [False, '2024-03-06T00:30:00'])],
 [('paper previous day evening',
   ['2024-03-04T21:00:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [True, '2024-03-04T21:00:00']),
  ('electronic next day',
   ['2024-03-06T00:00:01Z', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T00:00:01']),
  ('offset stamp plus zone',
   ['2024-03-06T01:15:00+01:00', '2024-03-05', -60, 'electronic', '17:00'],
   [True, '2024-03-05T23:15:00']),
  ('regression: west zone late evening',
   ['2024-03-06T04:30:00Z', '2024-03-05', -300, 'electronic', '17:00'],
   [True, '2024-03-05T23:30:00']),
  ('east zone after midnight',
   ['2024-03-05T22:30:00Z', '2024-03-05', 120, 'electronic', '17:00'],
   [False, '2024-03-06T00:30:00']),
  ('explicit offset stamp',
   ['2024-03-05T23:30:00-05:00', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T04:30:00']),
  ('last second electronic',
   ['2024-03-05T23:59:30Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T23:59:30']),
  ('paper after close',
   ['2024-03-05T17:30:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [False, '2024-03-05T17:30:00']),
  ('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00'])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
regression: west zone late evening[True, '2024-03-05T23:30:00'][True, '2024-03-05T23:30:00']Passed
east zone after midnight[False, '2024-03-06T00:30:00'][False, '2024-03-06T00:30:00']Passed
explicit offset stamp[False, '2024-03-06T04:30:00'][False, '2024-03-06T04:30:00']Passed
last second electronic[True, '2024-03-05T23:59:30'][True, '2024-03-05T23:59:30']Passed
deadline day morning[True, '2024-03-05T09:00:00'][True, '2024-03-05T09:00:00']Passed
paper after close[True, '2024-03-05T17:30:00'][False, '2024-03-05T17:30:00']Failed
paper exactly at close[True, '2024-03-05T17:00:00'][False, '2024-03-05T17:00:00']Failed

SHA-256 / 0871fed533e40270f4dba756c44f4d6788e82d4faba8ddc5841db05d2bc78414

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json
import datetime as dt
import calendar
N = 1
observations = []
def solve(filed, deadline, offset_min, method, office_close):
    u = dt.datetime.fromisoformat(filed.replace('Z', '+00:00')).astimezone(dt.timezone.utc).replace(tzinfo=None)
    local = u + dt.timedelta(minutes=offset_min)
    dl = dt.date.fromisoformat(deadline)
    if method == 'electronic':
        timely = local.date() <= dl
    else:
        close = dt.time.fromisoformat(office_close)
        timely = local.date() < dl or (local.date() == dl and local.time() <= close)
    return [timely, local.isoformat(timespec='seconds')]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: west zone late evening',
   ['2024-03-06T04:30:00Z', '2024-03-05', -300, 'electronic', '17:00'],
   [True, '2024-03-05T23:30:00']),
  ('east zone after midnight',
   ['2024-03-05T22:30:00Z', '2024-03-05', 120, 'electronic', '17:00'],
   [False, '2024-03-06T00:30:00']),
  ('explicit offset stamp',
   ['2024-03-05T23:30:00-05:00', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T04:30:00']),
  ('last second electronic',
   ['2024-03-05T23:59:30Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T23:59:30']),
  ('deadline day morning',
   ['2024-03-05T09:00:00Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T09:00:00']),
  ('paper after close',
   ['2024-03-05T17:30:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [False, '2024-03-05T17:30:00']),
  ('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00'])],
 [('explicit offset stamp',
   ['2024-03-05T23:30:00-05:00', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T04:30:00']),
  ('last second electronic',
   ['2024-03-05T23:59:30Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T23:59:30']),
  ('deadline day morning',
   ['2024-03-05T09:00:00Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T09:00:00']),
  ('paper after close',
   ['2024-03-05T17:30:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [False, '2024-03-05T17:30:00']),
  ('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00']),
  ('paper before close offset',
   ['2024-03-05T14:00:00+02:00', '2024-03-05', 60, 'paper', '16:30'],
   [True, '2024-03-05T13:00:00']),
  ('paper previous day evening',
   ['2024-03-04T21:00:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [True, '2024-03-04T21:00:00'])],
 [('deadline day morning',
   ['2024-03-05T09:00:00Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T09:00:00']),
  ('paper after close',
   ['2024-03-05T17:30:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [False, '2024-03-05T17:30:00']),
  ('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00']),
  ('paper before close offset',
   ['2024-03-05T14:00:00+02:00', '2024-03-05', 60, 'paper', '16:30'],
   [True, '2024-03-05T13:00:00']),
  ('paper previous day evening',
   ['2024-03-04T21:00:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [True, '2024-03-04T21:00:00']),
  ('electronic next day',
   ['2024-03-06T00:00:01Z', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T00:00:01']),
  ('offset stamp plus zone',
   ['2024-03-06T01:15:00+01:00', '2024-03-05', -60, 'electronic', '17:00'],
   [True, '2024-03-05T23:15:00'])],
 [('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00']),
  ('paper before close offset',
   ['2024-03-05T14:00:00+02:00', '2024-03-05', 60, 'paper', '16:30'],
   [True, '2024-03-05T13:00:00']),
  ('paper previous day evening',
   ['2024-03-04T21:00:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [True, '2024-03-04T21:00:00']),
  ('electronic next day',
   ['2024-03-06T00:00:01Z', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T00:00:01']),
  ('offset stamp plus zone',
   ['2024-03-06T01:15:00+01:00', '2024-03-05', -60, 'electronic', '17:00'],
   [True, '2024-03-05T23:15:00']),
  ('regression: west zone late evening',
   ['2024-03-06T04:30:00Z', '2024-03-05', -300, 'electronic', '17:00'],
   [True, '2024-03-05T23:30:00']),
  ('east zone after midnight',
   ['2024-03-05T22:30:00Z', '2024-03-05', 120, 'electronic', '17:00'],
   [False, '2024-03-06T00:30:00'])],
 [('paper previous day evening',
   ['2024-03-04T21:00:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [True, '2024-03-04T21:00:00']),
  ('electronic next day',
   ['2024-03-06T00:00:01Z', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T00:00:01']),
  ('offset stamp plus zone',
   ['2024-03-06T01:15:00+01:00', '2024-03-05', -60, 'electronic', '17:00'],
   [True, '2024-03-05T23:15:00']),
  ('regression: west zone late evening',
   ['2024-03-06T04:30:00Z', '2024-03-05', -300, 'electronic', '17:00'],
   [True, '2024-03-05T23:30:00']),
  ('east zone after midnight',
   ['2024-03-05T22:30:00Z', '2024-03-05', 120, 'electronic', '17:00'],
   [False, '2024-03-06T00:30:00']),
  ('explicit offset stamp',
   ['2024-03-05T23:30:00-05:00', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T04:30:00']),
  ('last second electronic',
   ['2024-03-05T23:59:30Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T23:59:30']),
  ('paper after close',
   ['2024-03-05T17:30:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [False, '2024-03-05T17:30:00']),
  ('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00'])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
regression: west zone late evening[True, '2024-03-05T23:30:00'][True, '2024-03-05T23:30:00']Passed
east zone after midnight[False, '2024-03-06T00:30:00'][False, '2024-03-06T00:30:00']Passed
explicit offset stamp[False, '2024-03-06T04:30:00'][False, '2024-03-06T04:30:00']Passed
last second electronic[True, '2024-03-05T23:59:30'][True, '2024-03-05T23:59:30']Passed
deadline day morning[True, '2024-03-05T09:00:00'][True, '2024-03-05T09:00:00']Passed
paper after close[False, '2024-03-05T17:30:00'][False, '2024-03-05T17:30:00']Passed
paper exactly at close[True, '2024-03-05T17:00:00'][False, '2024-03-05T17:00:00']Failed

SHA-256 / 5338c5e06b056d8c6eefa9f80e8ff35644780d575cb7840fe60833be6c20906b

3 / The verified repair

Exit 0
"""Failure Map reference implementation. Python standard library only."""
import json
import datetime as dt
import calendar
N = 1
observations = []
def solve(filed, deadline, offset_min, method, office_close):
    u = dt.datetime.fromisoformat(filed.replace('Z', '+00:00')).astimezone(dt.timezone.utc).replace(tzinfo=None)
    local = u + dt.timedelta(minutes=offset_min)
    dl = dt.date.fromisoformat(deadline)
    if method == 'electronic':
        timely = local.date() <= dl
    else:
        close = dt.time.fromisoformat(office_close)
        timely = local.date() < dl or (local.date() == dl and local.time() < close)
    return [timely, local.isoformat(timespec='seconds')]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: west zone late evening',
   ['2024-03-06T04:30:00Z', '2024-03-05', -300, 'electronic', '17:00'],
   [True, '2024-03-05T23:30:00']),
  ('east zone after midnight',
   ['2024-03-05T22:30:00Z', '2024-03-05', 120, 'electronic', '17:00'],
   [False, '2024-03-06T00:30:00']),
  ('explicit offset stamp',
   ['2024-03-05T23:30:00-05:00', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T04:30:00']),
  ('last second electronic',
   ['2024-03-05T23:59:30Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T23:59:30']),
  ('deadline day morning',
   ['2024-03-05T09:00:00Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T09:00:00']),
  ('paper after close',
   ['2024-03-05T17:30:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [False, '2024-03-05T17:30:00']),
  ('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00'])],
 [('explicit offset stamp',
   ['2024-03-05T23:30:00-05:00', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T04:30:00']),
  ('last second electronic',
   ['2024-03-05T23:59:30Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T23:59:30']),
  ('deadline day morning',
   ['2024-03-05T09:00:00Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T09:00:00']),
  ('paper after close',
   ['2024-03-05T17:30:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [False, '2024-03-05T17:30:00']),
  ('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00']),
  ('paper before close offset',
   ['2024-03-05T14:00:00+02:00', '2024-03-05', 60, 'paper', '16:30'],
   [True, '2024-03-05T13:00:00']),
  ('paper previous day evening',
   ['2024-03-04T21:00:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [True, '2024-03-04T21:00:00'])],
 [('deadline day morning',
   ['2024-03-05T09:00:00Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T09:00:00']),
  ('paper after close',
   ['2024-03-05T17:30:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [False, '2024-03-05T17:30:00']),
  ('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00']),
  ('paper before close offset',
   ['2024-03-05T14:00:00+02:00', '2024-03-05', 60, 'paper', '16:30'],
   [True, '2024-03-05T13:00:00']),
  ('paper previous day evening',
   ['2024-03-04T21:00:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [True, '2024-03-04T21:00:00']),
  ('electronic next day',
   ['2024-03-06T00:00:01Z', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T00:00:01']),
  ('offset stamp plus zone',
   ['2024-03-06T01:15:00+01:00', '2024-03-05', -60, 'electronic', '17:00'],
   [True, '2024-03-05T23:15:00'])],
 [('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00']),
  ('paper before close offset',
   ['2024-03-05T14:00:00+02:00', '2024-03-05', 60, 'paper', '16:30'],
   [True, '2024-03-05T13:00:00']),
  ('paper previous day evening',
   ['2024-03-04T21:00:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [True, '2024-03-04T21:00:00']),
  ('electronic next day',
   ['2024-03-06T00:00:01Z', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T00:00:01']),
  ('offset stamp plus zone',
   ['2024-03-06T01:15:00+01:00', '2024-03-05', -60, 'electronic', '17:00'],
   [True, '2024-03-05T23:15:00']),
  ('regression: west zone late evening',
   ['2024-03-06T04:30:00Z', '2024-03-05', -300, 'electronic', '17:00'],
   [True, '2024-03-05T23:30:00']),
  ('east zone after midnight',
   ['2024-03-05T22:30:00Z', '2024-03-05', 120, 'electronic', '17:00'],
   [False, '2024-03-06T00:30:00'])],
 [('paper previous day evening',
   ['2024-03-04T21:00:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [True, '2024-03-04T21:00:00']),
  ('electronic next day',
   ['2024-03-06T00:00:01Z', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T00:00:01']),
  ('offset stamp plus zone',
   ['2024-03-06T01:15:00+01:00', '2024-03-05', -60, 'electronic', '17:00'],
   [True, '2024-03-05T23:15:00']),
  ('regression: west zone late evening',
   ['2024-03-06T04:30:00Z', '2024-03-05', -300, 'electronic', '17:00'],
   [True, '2024-03-05T23:30:00']),
  ('east zone after midnight',
   ['2024-03-05T22:30:00Z', '2024-03-05', 120, 'electronic', '17:00'],
   [False, '2024-03-06T00:30:00']),
  ('explicit offset stamp',
   ['2024-03-05T23:30:00-05:00', '2024-03-05', 0, 'electronic', '17:00'],
   [False, '2024-03-06T04:30:00']),
  ('last second electronic',
   ['2024-03-05T23:59:30Z', '2024-03-05', 0, 'electronic', '17:00'],
   [True, '2024-03-05T23:59:30']),
  ('paper after close',
   ['2024-03-05T17:30:00Z', '2024-03-05', 0, 'paper', '17:00'],
   [False, '2024-03-05T17:30:00']),
  ('paper exactly at close',
   ['2024-03-05T22:00:00Z', '2024-03-05', -300, 'paper', '17:00'],
   [False, '2024-03-05T17:00:00'])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
regression: west zone late evening[True, '2024-03-05T23:30:00'][True, '2024-03-05T23:30:00']Passed
east zone after midnight[False, '2024-03-06T00:30:00'][False, '2024-03-06T00:30:00']Passed
explicit offset stamp[False, '2024-03-06T04:30:00'][False, '2024-03-06T04:30:00']Passed
last second electronic[True, '2024-03-05T23:59:30'][True, '2024-03-05T23:59:30']Passed
deadline day morning[True, '2024-03-05T09:00:00'][True, '2024-03-05T09:00:00']Passed
paper after close[False, '2024-03-05T17:30:00'][False, '2024-03-05T17:30:00']Passed
paper exactly at close[False, '2024-03-05T17:00:00'][False, '2024-03-05T17:00:00']Passed

SHA-256 / 2870258953e93fbd7abd0c4f3374cd816326fcd86cc50da7fe97b448444d5635

Verification & scope

Stipulated toy deadline rules evaluated offline on explicit fixtures. The contract is inspired by common court-rule structures but is not legal advice and makes no claim to reproduce any jurisdiction's rules. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:49:25.719542+00:00.

Case digest / 37b8504cb656b8e00b2994c55b87971e0a4a156df50627b10fb0d2519f4de194