N.Y.C. Admin. Code § 19-538: § 19-538 Vision impairment accessibility requirements.

a. For the purposes of this section, "accessible to people with vision impairments" shall mean any taxicab that is equipped with instructions for contacting the commission in Braille and large-print text on the same side and in the same passenger compartment in each taxicab. If such taxicab has payment technology installed, such technology should be in the same passenger compartment in each taxicab, and should also provide a payment option, with the fare audibly announced and with audio instruction, to permit visually impaired passengers to pay unassisted, in such manner as provided for and adopted by the commission.

b. Commencing May 1, 2013, all taxicabs must be accessible to people with vision impairments.

c. The commission may by rule establish greater levels of accessibility for taxicabs than those required by this section.