The State of New York shall have jurisdiction over offenses committed by or against Indians on Indian reservations within the State of New York to the same extent as the courts of the State have jurisdiction over offenses committed elsewhere within the State as defined by the laws of the State: Provided, That nothing contained in this section shall be construed to deprive any Indian tribe, band, or community, or members thereof,¹ hunting and fishing rights as guaranteed them by agreement, treaty, or custom, nor require them to obtain State fish and game licenses for the exercise of such rights.