New York Consolidated Laws, Public Health Law - PBH § 3362. Lawful medical use

(a) the marihuana that may be possessed by a certified patient shall not exceed a thirty day supply of the dosage as determined by the practitioner, consistent with any guidance and regulations issued by the commissioner, provided that during the last seven days of any thirty day period, the certified patient may also possess up to such amount for the next thirty day period;

(b) the marihuana that may be possessed by designated caregivers does not exceed the quantities referred to in paragraph (a) of this subdivision for each certified patient for whom the caregiver possesses a valid registry identification card, up to five certified patients;

(c) the form or forms of medical marihuana that may be possessed by the certified patient or designated caregiver pursuant to a certification shall be in compliance with any recommendation or limitation by the practitioner as to the form or forms of medical marihuana or dosage for the certified patient in the certification; and

(d) the medical marihuana shall be kept in the original package in which it was dispensed under subdivision twelve of section thirty-three hundred sixty-four of this title, except for the portion removed for immediate consumption for certified medical use by the certified patient.

(a) possession of medical marihuana shall not be lawful under this title if it is smoked, consumed, vaporized, or grown in a public place, regardless of the form of medical marihuana stated in the patient's certification.

(b) a person possessing medical marihuana under this title shall possess his or her registry identification card at all times when in immediate possession of medical marihuana.