All vessels of over 150 gross tons, when engaged on an international voyage, shall be equipped with an efficient daylight signaling lamp in accordance with the requirements of subchapter J (Electrical Engineering) of this chapter.
[CGFR 68-32, 33 FR 5711, Apr. 12, 1968, as amended by CGD 97-057, 62 FR 51042, Sept. 30, 1997]