The permit holder shall ensure:

(1) A three-compartment sink is available on the mobile food unit with potable hot and cold running water to wash, rinse, and sanitize utensils when utensils are reused on the mobile food unit; except

(2) This requirement may be waived or modified by the regulatory authority when:

(a) Limited food preparation occurs; or

(b) Additional clean utensils are available and utensil washing takes place at an approved commissary or servicing area.