N.Y. Comp. Codes R. & Regs. Tit. 10 §§ 69-7.1
The following medical conditions, when their existence is certified by a physician, physician assistant or nurse practitioner, justify granting an exemption from the limits on light transmittance found in Vehicle and Traffic Law, section 375(12-a)(b), provided that personal protective measures such as sun protective clothing, sunscreen, or eye protective devices do not offer adequate protection:
Albinism;
chronic actinic dermatitis/actinic reticuloid;
dermatomyositis;
lupus erythematosus;
porphyria;
xeroderma pigmentosum;
severe drug photosensitivity, provided that the course of treatment causing the photosensitivity is expected to be of prolonged duration;
photophobia associated with an ophthalmic or neurological disorder; and
any other condition or disorder causing severe photosensitivity in which the individual is required for medical reasons to be shielded from the direct rays of the sun.
N.Y. Comp. Codes R. & Regs. Tit. 10 §§ 69-7.1