[MaxGhenis]

Uses the shared federal poverty-guideline calculation for WIC's income ceiling. The published 2016 schedule has nonuniform rows that the former linear calculation missed. For a three-person Texas family in January 2017, the annual WIC ceiling becomes $37,296 rather than $37,370; the tested age-three child no longer qualifies through the income test at $37,297.

The USDA notice, printed pages 14826–14829 supplies the July 2016–June 2017 window, 185% multiplier, upward rounding and published rows. The Texas DSHS table, served by UTHealth corroborates the July 1 adoption and exact family ceiling. This PR depends on #10886's literal 2016 HHS table.

Validation:

• Genuine pre-fix failure at $37,297. After integrating the final Use exact 2016 HHS poverty guideline tables #10886 dependency and canonical ACA updates, all 16 focused cases passed in one capped process (15.95 seconds). The earlier fixture-period corrections remain recorded separately.
• Focused in-session source/code checking reproduced 24 base and six extended WIC ceilings, traced the real-family boundary cases and final zero awards, and checked preservation of all eight original cases and 26 protected files.
• make format passed with all four reviewed file hashes unchanged; current-head CI remains pending.

Pregnancy counting, geography mapping, July selection, annual countable income, the 185% rate and rounding remain unchanged. The family tests state nonenrollment assumptions and retain the existing nutritional-risk default. Positive historical WIC package valuation, state-specific early adoption and complete historical WIC coverage remain outside this correction. No partner test changes.

WIP: final #10886 branch is integrated with all four reviewed file hashes unchanged. Keep draft until that dependency merges; current-head CI and merge checks remain.

axiom: TheAxiomFoundation/rulespec-us#2221 queued

Required Opus Subfleet review is queued as 20261113-185630-history-wic-income under the updated AGENTS instructions. Earlier in-session checks are supporting evidence; merge waits for the required review.