The record
In 1973 FDA proposed limits on asbestos in talc used in food and drugs (38 FR 27076; the notice runs 27076-27081, with the talc provision at proposed 21 CFR 121.2006, pp. 27079-80).
Claim scope
That FDA formally proposed asbestos limits for talc in food and drug applications in 1973, with the proposal's exact Federal Register location.
What this source does not establish
The proposal's scope was food and drugs, not cosmetics — do not cite it as a cosmetic-talc rulemaking. It was a proposal, never a final rule.
Limitations
Cite the page range and section number precisely; describe as a proposed rule within its food/drug scope.
Source
Federal Register — 38 FR 27076 (Sept. 28, 1973), 'Asbestos Particles in Food and Drugs: Notice of Proposed Rulemaking,' 21 CFR Parts 121, 128, 133; proposed 21 CFR 121.2006 (Talc) at 38 FR 27079-27080