47 CFR 79.104: Closed caption decoder requirements for recording devices.

(a) Effective January 1, 2014, all apparatus designed to record video programming transmitted simultaneously with sound, if such apparatus is manufactured in the United States or imported for use in the United States, must comply with the provisions of this section except that apparatus must only do so if it is achievable as defined in § 79.103(b)(3).

Note to paragraph (a):

This paragraph places no restrictions on the importing, shipping, or sale of apparatus that were manufactured before January 1, 2014.

(b) All apparatus subject to this section must enable the rendering or the pass through of closed captions such that viewers are able to activate and de-activate the closed captions as the video programming is played back as described in § 79.103(c).

(c) All apparatus subject to this section must comply with the interconnection mechanism requirements in § 79.103(d).