; (ii) be appropriately voiced, considering whether the use of synthetic voices is permissible and if so, under what circumstances; and (iii) be appropriately edited and encoded to ensure consistency with the editing and encoding of the non-description audio track of the programming. (5) Audio description exemptions Notwithstanding paragraphs (2) and (3)— (A) the Commission may exempt by regulation from the requirements under paragraphs (2) and (3) programs, classes of programs, or services for which the Commission has determined that the provision of audio description would be economically burdensome to an entity responsible for publishing or exhibiting or making available such programming; and (B) an entity responsible for publishing or exhibiting or making available video programming may petition the Commission for an exemption from the requirements under paragraphs (2) and (3), and the Commission may grant the exemption upon a showing that the requirement to include audio description would be economically burdensome. The Commission shall act to grant or deny any such petition, in whole or in part, not later than 6 months after the Commission receives the petition, unless the Commission finds that an extension of the 6-month period is necessary to determine whether the requirements are economically burdensome. . (b) Technical and conforming amendments Title III of the Communications Act of 1934 ( 47 U.S.C. 301 et seq. ) is amended— (1) in section 303 ( 47 U.S.C. 303 )— (A) in subsection (u)— (i) in paragraph (1)(B)— (I) by striking video description and inserting audio description ; and (II) by striking section 713(f) and inserting section 713(g) ; and (ii) by moving the left margin of that subsection and each paragraph, subparagraph, and clause therein 2 ems to the left; and (B) in subsection (z)(1), by striking video description each place the term appears and inserting audio description