{"data":{"id":"us/42-cfr-7.3","jurisdiction":"us","citation":"42 CFR 7.3","heading":"Definitions.","body":"Biological standards means a uniform and stable reference biological substance which allows measurements of relative potency to be made and described in a common currency of international and national units of activity.\nBiological preparations means a reference biological substance which may be used for a purpose similar to that of a standard, but which has been established without a full collaborative study, or where a collaborative study has shown that it is not appropriate to establish the preparation as an international standard.","path":["Title 42—Public Health","CHAPTER I—PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER A—GENERAL PROVISIONS","PART 7—DISTRIBUTION OF REFERENCE BIOLOGICAL STANDARDS AND BIOLOGICAL PREPARATIONS"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-42.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:11Z","sha256":"a92e13e53ef95295c346a57f9d31f01384780dd892cb6e2593bf2f32542f3747","source_id":"us-cfr","stale":true,"prev":"us/42-cfr-7.2","next":"us/42-cfr-7.4"},"notice":"GroundRules: Original legal text. Not legal advice."}