25 CFR § 11.603 - Invalid or prohibited marriages.

---
identifier: "/us/cfr/t25/s11.603"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "25 CFR § 11.603 - Invalid or prohibited marriages."
title_number: 25
title_name: "Indians"
section_number: "11.603"
section_name: "Invalid or prohibited marriages."
chapter_name: "BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR"
subchapter_number: "B"
subchapter_name: "LAW AND ORDER"
part_number: "11"
part_name: "COURTS OF INDIAN OFFENSES AND LAW AND ORDER CODE"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "5 U.S.C. 301; R.S. 463, 25 U.S.C. 2; R.S. 465, 25 U.S.C. 9; 42 Stat. 208, 25 U.S.C. 13; 38 Stat. 586, 25 U.S.C. 200."
regulatory_source: "58 FR 54411, Oct. 21, 1993, unless otherwise noted."
cfr_part: "11"
---


# 11.603 Invalid or prohibited marriages.

(a) The following marriages are prohibited:

(1) A marriage entered into prior to the dissolution of an earlier marriage of one of the parties;

(2) A marriage between an ancestor and a descendant, or between a brother and a sister, whether the relationship is by the half or the whole blood;

(3) A marriage between an aunt and a nephew or between an uncle and a niece, whether the relationship is by the half or the whole blood, except as to marriages permitted by established tribal custom;

(4) A marriage prohibited by custom and usage of the tribe.

(b) Children born of a prohibited marriage are legitimate.