Owners of petroleum underground storage tanks are required to comply with the requirements of this subchapter by the following dates:

(1) All petroleum marketing firms owning 1,000 or more USTs and all other UST owners that report a tangible net worth of $20 million or more to the U.S. Securities and Exchange Commission (SEC) , Dun and Bradstreet, the Energy Information Administration, or the Rural Electrification Administration; effective date of this rule.

(2) All petroleum marketing firms owning 100-999 USTs; effective date of this rule.

(3) All petroleum marketing firms owning 13-99 USTs at more than one facility; April 26, 1990.

(4) All petroleum UST owners not described in (1) , (2) , or (3) of this rule, including all local government entities; October 26, 1990.