Section 2.800 - Scope and applicability(a) This subpart governs the issuance, amendment, and repeal of regulations in which participation by interested persons is prescribed under Section 553 of title 5 of the U.S. Code.(b) The procedures in §§ 2.804 through 2.810 apply to all rulemakings.(c) The procedures in §§ 2.802 through 2.803 apply to all petitions for rulemaking except for initial applications for standard design certification rulemaking under subpart B of part 52 of this chapter, and subsequent petitions for amendment of an existing design certification rule filed by the original applicant for the design certification rule.(d) The procedures in §§ 2.811 through 2.819 , as supplemented by the provisions of subpart B of part 52, apply to standard design certification rulemaking.72 FR 49481, Aug. 28, 2007