N.Y.C. Admin. Code § 28-501.4: § 28-501.4 Civil penalties.

Any person who places or maintains a sign on a building or premises without an appropriate permit in violation of this article shall be liable for a civil penalty of, for a first violation, not more than fifteen thousand dollars and, for a second or subsequent violation, not more than twenty-five thousand dollars. Each day's continuance shall be a separate and distinct violation. Such civil penalties may be recovered in an action in any court of appropriate jurisdiction or in a proceeding before the environmental control board. Such board shall have the power to impose the civil penalties provided for in this article. Notwithstanding the provisions of section six hundred sixty-six of the charter, a notice of violation issued by the department pursuant to this section 28-501.4 shall not be subject to review by the board of standards and appeals.