N.Y.C. Admin. Code § 27-508.4: § 27-508.4 Non-compliant advertisements to be removed.

The owner, operator or lessee of any location or premises where a tobacco product advertisement is prohibited or restricted pursuant to the requirements of section 27-508.3 of this article shall have thirty days from the effective date of the local law that added this section to remove any non-compliant tobacco product advertisements.