33 C.F.R. § 127.113
(a) The marine transfer area for LNG must have warning signs that—
(3) Have the following text:
Warning Dangerous Cargo No Visitors No Smoking No Open Lights
(b) Each letter in the words on the sign must be—
[CGD 78-038, 53 FR 3376, Feb. 7, 1988, as amended by CGD 88-049, 60 FR 39796, Aug. 3, 1995]