N.Y. Comp. Codes R. & Regs. tit. 21, § 1050.6
(b) No person, unless duly authorized by the authority shall engage in any commercial activity upon any facility or conveyance. Commercial activities include:
(c) Except as expressly and permitted in this subdivision, no person shall engage in any nontransit uses upon any facility or conveyance. Nontransit uses are noncommercial activities that are not directly related to the use of a facility or conveyance for transportation, and include remaining in the paid fare zone of a particular subway station for more than one hour. The following nontransit uses are permitted by the authority, provided they do not impede transit activities and they are conducted in accordance with these rules: public speaking; campaigning; leafletting or distribution of written noncommercial materials; activities intended to encourage and facilitate voter registration; artistic performances, including the acceptance of donations; solicitation for religious or political causes; solicitation for charities that: (1) have been licensed for any public solicitation within the preceding 12 months by the Commissioner of Social Services of the City of New York under section 21-111 of the Administrative Code of the City of New York or any successor provision; (2) are duly registered as charitable organizations with the Attorney General of New York under section 172 of the New York Executive Law or any successor provision; or (3) are exempt from Federal income tax under section 501(c)(3) of the United States Internal Revenue Code or any successor provision. Solicitors for such charities shall provide, upon request, evidence that such charity meets one of the preceding qualifications.
(1) Permitted nontransit uses may be conducted in the transit system except:
(d) All persons on or in any facility or conveyance of the authority shall: