N.Y.C. Admin. Code § 20-270: § 20-270 Sign for new and second-hand articles.

Every person licensed as a dealer in second-hand articles, who also sells new articles within the licensed premises, shall have a sign of not less than two hundred sixteen square inches with letters thereon not less than two inches in height prominently displayed within the department or area where said articles are sold, informing the public that new articles and second-hand articles are sold within said department or area.