Sec. 22. (a) A provider may not charge any taxes or fees to users of inmate calling services for, or in connection with, intrastate calls, except for the following:
(1) Authorized fees.
(2) Mandatory taxes and fees.
(b) Any:
(1) authorized fee; or
(2) mandatory tax or fee;
passed through to consumers for, or in connection with, intrastate inmate calling services may not include a markup, unless the markup is specifically authorized by a federal, state, or local statute, rule, or regulation.