21 CFR § 1.233 - Are there optional items included in the registration form?

---
identifier: "/us/cfr/t21/s1.233"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 1.233 - Are there optional items included in the registration form?"
title_number: 21
title_name: "Food and Drugs"
section_number: "1.233"
section_name: "Are there optional items included in the registration form?"
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "A"
subchapter_name: "GENERAL"
part_number: "1"
part_name: "GENERAL ENFORCEMENT REGULATIONS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "15 U.S.C. 1333, 1453, 1454, 1455, 4402; 19 U.S.C. 1490, 1491; 21 U.S.C. 321, 331, 332, 333, 334, 335a, 342, 343, 350c, 350d, 350j, 352, 355, 360b, 360ccc, 360ccc-1, 360ccc-2, 362, 371, 374, 381, 382, 384a, 387, 387a, 387c, 393, and 2223; 42 U.S.C. 216, 241, 243, 262, 264, 271."
regulatory_source: "42 FR 15553, Mar. 22, 1977, unless otherwise noted."
cfr_part: "1"
---


# 1.233 Are there optional items included in the registration form?

Yes. FDA encourages, but does not require, you to submit items that are indicated as optional on the Form FDA 3537 that you submit.

[81 FR 45952, July 14, 2016]