(a) Except as provided in paragraph (b) of this section, all proposed DOT guidance documents determined to be a “significant guidance document” within the meaning of §5.37 shall be subject to the following informal notice-and-comment procedures. The issuing OA or component of OST shall publish a notice in the Federal Register announcing that a draft of the proposed guidance document is publicly available, shall post the draft guidance document on its website, shall invite public comment on the draft document for a minimum of 30 days, and shall prepare and post a public response to major concerns raised in the comments, as appropriate, on its website, either before or when the guidance document is finalized and issued.

(b) The requirements of paragraph (a) of this section will not apply to any significant guidance document or categories of significant guidance documents for which OGC finds, in consultation with OIRA, the proposing OA or component of OST, and the Secretary, good cause that notice and public procedure thereon are impracticable, unnecessary, or contrary to the public interest (and incorporates the finding of good cause and a brief statement of reasons therefor in the guidance issued). Unless OGC advises otherwise in writing, the categories of guidance documents listed in appendix A5 will be exempt from the requirements of paragraph (a) of this section.

(c) Where appropriate, OGC or the proposing OA or component of OST may recommend to the Secretary that a particular guidance document that is otherwise of importance to the Department's interests shall also be subject to the informal notice-and-comment procedures described in paragraph (a) of this section.