N.Y. Vehicle & Traffic Law § 509-k: Ill or fatigued operator

§ 509-k. Ill or fatigued operator. No driver shall operate a bus and a

motor carrier shall not permit a driver to operate a bus while the

driver's ability or alertness is so impaired, or so likely to become

impaired, through fatigue, illness or any other cause, as to make it

unsafe for such driver to begin or continue to operate the bus. At the

request of the driver or the motor carrier such illness, fatigue, or

other cause shall be certified by a qualified physician or nurse

practitioner. However, in a case of grave emergency where the hazard to

occupants of the bus or other users of the highway would be increased by

compliance with this section, the driver may continue to operate the bus

to the nearest place at which that hazard is removed.