N.Y.C. Admin. Code § 10-1006: § 10-1006 Joint and several liability.

If it is found, in any action brought pursuant to the provisions of this chapter, that two or more of the named defendants acted in concert pursuant to a common plan or design to violate any provision of subdivision a of section 10-1003, such defendants shall be held jointly and severally liable for any fines or penalties imposed or any damages awarded.