A 2022 advocacy-org count found most US states (31 + DC) default to Nemeth Code for technical/math braille, 7 default to UEB, and 11 leave the choice to the IEP team — but no primary BANA or NBA roster corroborates the figures

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claim-bana-2012-ueb-adoption-kept-nemeth-code-parallel establishes the mechanism: BANA's 2012 UEB vote left Nemeth Code alive as an officially parallel code for math and science, with the choice pushed down to states and ultimately to individual readers. The only located source that turns that mechanism into an actual state-by-state count is a blog run by a braille-education advocacy attorney, current as of March 2022: 31 states plus DC default to Nemeth for technical material, 7 default to UEB, 11 support both and leave the decision to each student's IEP team, and 1 state had not finalized a policy.

This is [unverified-quant — needs primary]. The source names no methodology beyond "according to our research," and no BANA, National Braille Association, or federal document carrying the same breakdown was found. Per the vault's sourcing floor, a specific count requires a Tier 1-2 source; this one is Tier 3. The routed verification — a primary state-by-state roster to check this figure against, and to compare against the historical 1871-1932 adoption pattern — is tracked at question-verify-nemeth-ueb-state-mandates-split.

The comparison this count was gathered to support — whether the modern 31/7/11/1 split correlates geographically with the older Braille/New York Point line — has not been performed by any source located this session; see claim-1871-1932-braille-standards-war-fought-institution-by-institution-not-fixed-lines for why that comparison may not even be well-posed.