as soon as practicable, and such decision shall be final. (f) Regulations Not later than 60 days after the date of enactment of this Act, the United States Postal Service shall issue rules implementing this section. (g) Definitions In this section: (1) Delivered late The term delivered late , with respect to a bill, notice of bill, or payment, means that— (A) such bill, notice, or payment was mailed