The record
Federal talc rulemaking has been proposed and abandoned twice: the 1973-75 food-and-drug proposal and the 2024-25 cosmetic-talc testing rule, with method questions cited in both instances.
Claim scope
A two-episode regulatory chronology spanning five decades, each documented in the Federal Register.
What this source does not establish
Do not date the arc from a 'first cosmetic proposal' — the 1973 proposal was food/drug in scope, so phrasings like '53 years after the first cosmetic proposal' are not supportable.
Limitations
Use as the regulatory-overview record; keep the two episodes' scopes distinct.
Source
Federal Register — 89 FR 105490 (Dec. 27, 2024); 90 FR 54603 (Nov. 28, 2025); compare 38 FR 27076 (Sept. 28, 1973) and 40 FR 11865 (Mar. 14, 1975)