# New Animal Drugs for Use in Animal Feed; Category Definitions; Confirmation of Effective Date
> **Food and Drug Administration** · Direct final rule; confirmation of effective date. · Published 2016-11-29 · Effective 2016-12-01 · 81 FR 85873
## Document
- **Document number:** 2016-28607
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 81 FR 85873
- **CFR reference:** 21 CFR 558
- **Publication date:** 2016-11-29
- **Effective date:** 2016-12-01
- **HHS docket:** Docket No. FDA-2016-N-1896
## Abstract

The Food and Drug Administration (FDA) is confirming the effective date of December 1, 2016, for the final rule that appeared in the Federal Register of August 24, 2016. The direct final rule amends the animal drug regulations by revising the definitions of the two categories of new animal drugs used in medicated feeds to base category assignment only on approved uses in major animal species. This document confirms the effective date of the direct final rule.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2016/11/29/2016-28607/new-animal-drugs-for-use-in-animal-feed-category-definitions-confirmation-of-effective-date)
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