27 CFR 5.64 - Legibility of mandatory information.
(a) Statements required under §§ 5.61 through 5.66 of this part to appear in any written, printed, or graphic advertisement shall be in lettering or type size sufficient to be conspicuous and readily legible.
(b) In the case of signs, billboards, and displays the name and address of the permittee responsible for the advertisement may appear in type size of lettering smaller than the other mandatory information, provided such information can be ascertained upon closer examination of the sign or billboard.
(c) Mandatory information shall be so stated as to be clearly a part of the advertisement and shall not be separated in any manner from the remainder of the advertisement.
(d) Manadatory information for two or more products shall not be stated unless clearly separated.
(e) Mandatory information shall be so stated in both the print and audio-visual media that it will be readily apparent to the persons viewing the advertisement.