(1) This part applies to owners and operators of all UST systems except as otherwise provided in this section.

(2) This part does not apply to owners and operators of any exempt UST system described in WAC 173-360A-0110(1).

(3) State and federal government entities whose debts and liabilities are the debts and liabilities of a state or the United States are exempt from the requirements of this part.

(4) If the owner and operator of an UST system are separate persons, only one person is required to demonstrate financial responsibility; however, both parties are liable in event of noncompliance.