UST system owners and operators must designate individuals as Class A, Class B, and Class C operators in accordance with the requirements of this section.

(1) At least one Class A and one Class B operator must be designated for each UST system or group of systems at a UST facility.

(2) Each individual who meets the definition of Class C operator at a UST facility must be designated as a Class C operator.

(3) Separate individuals may be designated for each operator class or an individual may be designated to more than one operator class.