---
kind: "section"
citation: "29 C.F.R. § 1205.4"
title: "29"
number: "1205.4"
heading: "Substantive rules."
url: "https://uscodex.org/cfr/29/1205.4"
---

# §1205.4. Substantive rules.


The only substantive rules issued by the National Mediation Board are those authorized under [section 2](/cfr/29/2.md), Ninth, of the Railway Labor Act to implement the procedure of determining employee representation.


## Notes

### Amendments

[12 FR 2451, Apr. 16, 1947. Redesignated at 13 FR 8740, Dec. 30, 1948, as amended at 64 FR 40287, July 26, 1999]

### Authority

Authority: 44 Stat. 577, as amended; 45 U.S.C. 151-163.

### Source

Source: 11 FR 177A-924, Sept. 11, 1946, unless otherwise noted. Redesignated at 13 FR 8740, Dec. 30, 1948.

### Amendments

[12 FR 2451, Apr. 16, 1947. Redesignated at 13 FR 8740, Dec. 30, 1948, as amended at 64 FR 40287, July 26, 1999]