Skip to content
LexBuild

15 USC § 318 - Weather signals on mail cars 

---
identifier: "/us/usc/t15/s318"
source: "usc"
legal_status: "official_prima_facie"
title: "15 USC § 318 - Weather signals on mail cars"
title_number: 15
title_name: "COMMERCE AND TRADE"
section_number: "318"
section_name: "Weather signals on mail cars"
chapter_number: 9
chapter_name: "NATIONAL WEATHER SERVICE"
positive_law: false
currency: "119-84"
last_updated: "2026-04-17"
format_version: "1.1.0"
generator: "[email protected]"
source_credit: "(Apr. 25, 1896, ch. 140, 29 Stat. 108; 1940 Reorg. Plan No. IV, § 8, eff. June 30, 1940, 5 F.R. 2421, 54 Stat. 1236; 1965 Reorg. Plan No. 2, §§ 1, 2, eff. July 13, 1965, 30 F.R. 8819, 79 Stat. 1318; Pub. L. 91–375, § 4(a), Aug. 12, 1970, 84 Stat. 773.)"
---

# § 318. Weather signals on mail cars

The Secretary of Commerce, in cooperation with the United States Postal Service, may arrange a plan by which there shall be displayed on all cars and other conveyances used for transporting United States mail suitable flags or other signals to indicate weather forecasts, cold-wave warnings, frost warnings, and so forth, to be furnished by the Secretary.

---

**Source Credit**: (Apr. 25, 1896, ch. 140, 29 Stat. 108; 1940 Reorg. Plan No. IV, § 8, eff. June 30, 1940, 5 F.R. 2421, 54 Stat. 1236; 1965 Reorg. Plan No. 2, §§ 1, 2, eff. July 13, 1965, 30 F.R. 8819, 79 Stat. 1318; Pub. L. 91–375, § 4(a), Aug. 12, 1970, 84 Stat. 773.)

## Statutory Notes and Related Subsidiaries

### Transfer of Functions

“United States Postal Service” substituted in text for “Postmaster General” pursuant to , , , set out as a note under , Postal Service, which abolished the office of Postmaster General of the Post Office Department and transferred its functions to the United States Postal Service.

## Executive Documents

### Transfer of Functions

Office of Chief of Weather Bureau abolished and functions transferred to Secretary of Commerce by Reorg. Plan No. 2 of 1965, eff. , 30 F.R. 8819, . Reorg. Plan No. IV of 1940 transferred Weather Bureau from Department of Agriculture to Department of Commerce. For further details, see notes set out under .