StacksVerified U.S. regulatory reference

49 CFR §193.2917

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Warning signs must be conspicuously placed along each protective enclosure at intervals so that at least one sign is recognizable at night from a distance of 30m (100 ft.) from any way that could reasonably be used to approach the enclosure.
  2. (b)Signs must be marked with at least the following on a background of sharply contrasting color: