(a) The rules in this part implement 39 U.S.C. 601,which.

(b) Notwithstanding placement in Postal Service chapter I of this title, the following provisions in parts 310 and 320 of this title are within the scope of this part and the Commission has the authority to interpret them:

(1) Section 310.1 of this title;

(2) Sections 310.2(b)(1) and (2) of this title; and

(3) Sections 320.1 through 320.8 of this title.

(c) In the event of a conflict between 39 U.S.C. 601 and applicable regulations under parts 310 and 320 of this title, 39 U.S.C. 601 shall supersede any other generally applicable requirements.

(a) The Postal Service may not promulgate any new regulations or enter into agreements purporting to suspend or otherwise define the scope of the letter monopoly.

(b) The Postal Service may not promulgate any new regulations purporting to interpret 39 U.S.C. 601.

(c) The Commission has the sole authority to promulgate new regulations necessary to carry out 39 U.S.C. 601.

(a) The Commission may, on its own motion, initiate a proceeding under this subpart pursuant to § 3010.201(a) of this chapter.

(b) The Commission may provide interpretation of these regulations or 39 U.S.C. 601 upon:

(1) A party's request to initiate a rulemaking proceeding with the Commission pursuant to the requirements of § 3010.201(b) of this chapter; or

(2) A party's request for an advisory opinion from the General Counsel.