9.9.10.6.

(1) Exit signs shall have the word EXIT or the words EXIT/SORTIE in red letters on a contrasting background or a red background with contrasting letters when the sign is internally lighted, and white letters on a red background or red letters on a white background when the sign is externally lighted.

(2) Lettering referred to in Sentence (1) shall be made with not less than 19 mm wide strokes and be not less than 150 mm high when the sign is externally lighted, and at least 114 mm high when the sign is internally lighted.

(3) Where an exit sign having the word EXIT is installed in conformance with Sentence (1), an additional sign having the word SORTIE is permitted to be installed.