A cable operator may not be required, as part of a request for proposals or as part of a proposal for renewal, subject to
section 546 of this title, to designate channel capacity for any use (other than commercial use by unaffiliated persons under this section) except as provided in sections 531 and 557 of this title, but a cable operator may offer in a franchise, or proposal for renewal thereof, to provide, consistent with applicable law, such capacity for other than commercial use by such persons.