A common carrier that is providing video programming in a manner described in paragraph (1) or (2), or a combination thereof, may elect to provide such programming by means of an open video system that complies with section
573 of this title. If the Commission approves such carrier’s certification under section
573 of this title, such carrier shall be subject to the requirements of this part, but shall be subject to parts I through IV of this subchapter only as provided in 573(c) of this title.