; (B) whether those alternatives can reasonably be considered comparable; (C) differing cost structures for transferring funds into correctional facilities and immigration detention facilities; and (D) such other factors as the Bureau may determine necessary or appropriate. (3) Differentiation permitted In issuing the final rules under paragraph (1), the Bureau may establish different standards for different types of fees and charges, as appropriate. 6. Requirements for confinement facility communications services (a) In general Section 276 of the Communications Act of 1934 ( 47 U.S.C. 276 ) is amended by adding at the end the following: (e) Additional requirements for confinement facility communications services (1) Authority (A) In general All charges, practices, classifications, and regulations for and in connection with confinement facility communications services shall be just and reasonable, and any such charge, practice, classification, or regulation that is unjust or unreasonable is declared to be unlawful. (B) Rulemaking required Not later than 18 months after the date of the enactment of this subsection, the Commission shall issue rules to adopt, for the provision of confinement facility communications services, rates and ancillary service charges that are just and reasonable, which shall be the maximum such rates and charges that a provider of confinement facility communications services may charge for such services. In determining rates and charges that are just and reasonable, the Commission shall adopt such rates and charges based on the average industry costs of providing such services using data collected from providers of confinement facility communications services. (C) Biennial review Not less frequently than every 2 years following the issuance of rules under subparagraph (B), the Commission shall— (i) determine whether the rates and ancillary service charges authorized by the rules issued under such subparagraph remain just and reasonable