line item charges to consumer or small business customer subscribers for the effective call authentication technology required under paragraph (1). (6) Evaluation Not later than 2 years after the date of enactment of this Act, and consistent with the regulations prescribed under subsection (a), the Commission shall initiate an evaluation of the success of the effective call authentication technology required under paragraph (1). (7) Unauthenticated calls The Commission shall— (A) in the regulations required by subsection (a), consistent with the regulations prescribed under subsection (k) of section 227 of the Communications Act of 1934 ( 47 U.S.C. 227 ), as added by section 8, help protect subscribers from receiving unwanted calls from a caller using an unauthenticated number, through effective means of enabling the subscriber or provider to block such calls, with no additional line item charge to the subscriber