; and (ii) under subparagraph (B) if the violation charged occurred more than 3 years prior to the date of issuance of the required notice or notice of apparent liability. (F) Rule of construction Notwithstanding any law to the contrary, the Commission may not determine or impose a forfeiture penalty on a person under both subparagraphs (A) and (B) based on the same conduct. ; and (2) by striking subsection (h). (b) Applicability The amendments made by this section shall not affect any action or proceeding commenced before and pending on the date of enactment of this Act. (c) Deadline for regulations The Federal Communications Commission shall prescribe regulations to implement the amendments made by this section not later than 270 days after the date of enactment of this Act. 3. Call authentication (a) Definitions In this section: (1) STIR/SHAKEN authentication framework The term STIR/SHAKEN authentication framework means the secure telephone identity revisited and signature-based handling of asserted information using tokens standards proposed by the information and communications technology industry to attach a certificate of authenticity to each phone to verify the source of each call. (2) Voice service The term voice service — (A) means any service that is interconnected with the public switched telephone network and that furnishes voice communications to an end user using resources from the North American Numbering Plan or any successor to the North American Numbering Plan adopted by the Commission under section 251(e)(1) of the Communications Act of 1934 ( 47 U.S.C. 251(e)(1) ); and (B) includes— (i) transmissions from a telephone facsimile machine, computer, or other device to a telephone facsimile machine