View all text of Subpart J [§ 193.2901 - § 193.2917]
§ 193.2917 - Warning signs.
(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.
(b) Signs must be marked with at least the following on a background of sharply contrasting color:
The words “NO TRESPASSING,” or words of comparable meaning.