; and (B) ensure that voice service providers that have implemented the effective authentication technology attest that such provider has determined, when originating calls on behalf of a calling party, that the calling party number transmitted with such calls has been appropriately authenticated. (2) Reassessment of regulations The Commission shall reassess such regulations, at least once every two years, to ensure the regulations remain effective and up to date with technological capabilities. (3) Exemption (A) Burdens and barriers to implementation The Commission— (i) shall include findings on any burdens or barriers to the implementation required in paragraph (1), including— (I) for providers of voice service to the extent the networks of such providers use time-division multiplexing; and (II) for small providers of voice service and those in rural areas