Summary

The federal TANF earned and unearned income source parameters (gov.hhs.tanf.cash.income.sources.earned and .unearned) currently start at 2020-01-01, but the income categorizations they define have been stable since the SSI definitions (1974+). Other federal TANF cash parameters in the age_limit/ folder already use 2010-07-01.

Files Affected

• parameters/gov/hhs/tanf/cash/income/sources/earned.yaml (2020-01-01 → 2010-07-01)
• parameters/gov/hhs/tanf/cash/income/sources/unearned.yaml (2020-01-01 → 2010-07-01)

Justification

• TANF delegates income definitions to states (42 U.S.C. § 602). These lists are a conventional baseline.
• The earned/unearned distinction (wages vs. benefits/investment income) has been unchanged across all federal means-tested programs since SSI (1974).
• Aligns with existing age_limit/student.yaml and age_limit/non_student.yaml which use 2010-07-01.
• 18+ state TANF implementations depend on these federal variables (tanf_gross_earned_income, tanf_gross_unearned_income).