Description
Return signed permission age and supplied validity remainder.
Participant time, compensation and renewal timing depend on explicit assumptions about visits, expenses, comprehension and applicable rules. A supplied rate or elapsed-time threshold can support bookkeeping while fair compensation, accessibility and valid consent require a broader contextual assessment.
Return signed permission age and supplied validity remainder.
When to use this tool
Use Consent Recontact Permission Date Gap when checking the stated research payment, burden, reading-time or renewal convention.
How to use the tool and how it works
- Enter lastPermissionDate, referenceDate, validityDays. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read ageDays, remainingDays. Use the output convention below.
Return signed permission age and supplied validity remainder. Require nonnegative whole validityDays and valid date-only inputs; ageDays is the UTC day difference, remainingDays = validityDays-ageDays.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| lastPermissionDate | Last Permission Date | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| referenceDate | Reference Date | Required. Text; maximum UTF-16 length 8192. Real proleptic Gregorian YYYY-MM-DD; four-digit years 0000-9999 accepted. |
| validityDays | Validity Days | Required. Safe integer; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| ageDays | Signed UTC-midnight day difference; future permission date is not rejected. | Required. Safe integer. |
| remainingDays | Remaining Days | Required. Safe integer. |
{
"input": {
"lastPermissionDate": "2026-10-01",
"referenceDate": "2026-10-26",
"validityDays": 30
},
"output": {
"ageDays": 25,
"remainingDays": 5
}
}Limitations and assumptions
- Future permission dates give negative age; no appropriate renewal policy, consent validity or legal expiry is selected.
- 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.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use participant-centered evidence and the original protocol and consent process; review payment, accessibility and renewal choices with the responsible ethics and professional teams.
References
Similar or alternative tools
- Consent Cooling Period Explicit Remainder
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- Assent Renewal Age Anchor Offset
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