§ 509-l. Drugs, controlled substances and intoxicating liquor. 1. No
person shall:

(a) consume a drug, controlled substance or an intoxicating liquor,
regardless of its alcoholic content, or be under the influence of an
intoxicating liquor or drug, within six hours before going on duty or
operating, or having physical control of a bus, or

(b) consume a drug, controlled substance or an intoxicating liquor,
regardless of its alcoholic content while on duty, or operating, or in
physical control of a bus, or

(c) possess a drug, controlled substance or an intoxicating liquor,
regardless of its alcoholic content while on duty, operating or in
physical control of a bus. However, this paragraph does not apply to
possession of a drug, controlled substance or an intoxicating liquor
which is transported as part of a shipment or personal effects of a
passenger or to alcoholic beverages which are in sealed containers.

2. No motor carrier shall require or permit a driver to:

(a) violate any provision of subdivision one of this section; or

(b) be on duty or operate a bus if, by such person's general
appearance or by such person's conduct or by other substantiating
evidence, such person appears to have consumed a drug, controlled
substance or an intoxicating liquor within the preceding six hours, or
eight hours when such driver operates a school bus as defined by section
one hundred forty-two of this chapter.