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Treaty Party Status At Date Tool

Check a supplied treaty-party interval with inclusive accession and exclusive withdrawal dates. An empty withdrawal date means no recorded end; no treaty database is consulted.

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Description

Parse accessionDate, optional withdrawalDate, and asOfDate.

Treaty and diplomatic records contain dates, party categories, and explicitly defined term boundaries. Arithmetic can check chronology and counts without determining the legal effect of an instrument.

Parse accessionDate, optional withdrawalDate, and asOfDate.

When to use this tool

Use Treaty Party Status At Date when you need a source-record chronology or party-count check.

How to use the tool and how it works

  1. Enter accessionDate, withdrawalDate, asOfDate. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read partyAtDate. Inspect partyAtDate before interpreting the associated values.

Parse accessionDate, optional withdrawalDate, and asOfDate. Treat empty withdrawal as open-ended, require withdrawal no earlier than accession, and test accession-inclusive/withdrawal-exclusive membership.1

Input fieldMeaning and unitsAccepted input
accessionDateAccession DateRequired. Text; maximum UTF-16 length 8192.
withdrawalDateWithdrawal DateRequired. Text; maximum UTF-16 length 8192.
asOfDateComparison date in the documented date convention.Required. Text; maximum UTF-16 length 8192.
Output fieldInterpretationReturned shape
partyAtDateParty At DateRequired. Boolean.
json
{
  "input": {
    "accessionDate": "2020-01-01",
    "withdrawalDate": "2026-10-01",
    "asOfDate": "2026-10-01"
  },
  "output": {
    "partyAtDate": false
  }
}

Limitations and assumptions

  • This models supplied dates only; legal accession, reservations, notice periods, party recognition, and actual treaty status are not established.
  • Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.

Alternative or Complementary methods

Consult the authoritative instrument, depositary records, and qualified legal interpretation for actual status or obligations.

References

  1. Calculation and input contract: international-relations/treaty-party-status-at-date — tool.io

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