(a) In a national emergency, as described in § 375.2, employers shall continue to follow, to the greatest extent possible, the requirements pertaining to employers in subchapters A, B, and C of this chapter.

(b) Where a national emergency, as described in § 375.2, prevents an employer from following any requirement imposed by paragraph (a) of this section, the employer shall comply with such requirement as soon as possible after the cessation of the national emergency.