Site Feedback

Title 21

Displaying title 21, up to date as of 8/14/2026. Title 21 was last amended 8/12/2026.
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

Title 21Food and DrugsPart / Section
Chapter IFood and Drug Administration, Department of Health and Human Services1 – 1299
Subchapter IMammography Quality Standards Act900
Part 900Mammography900.1 – 900.25
Subpart AAccreditation900.1 – 900.9
§ 900.1Scope.
§ 900.2Definitions.
§ 900.3Application for approval as an accreditation body.
§ 900.4Standards for accreditation bodies.
§ 900.5Evaluation.
§ 900.6Withdrawal of approval.
§ 900.7Hearings.
§§ 900.8-900.9 [Reserved]