Section 431.1 - [Effective until 3/10/2026] General(a)Applicability. This part applies to the following- (1) Licenses issued under this part before June 8, 2021; and(2) Licenses issued on or after June 8, 2021, if the FAA accepted the application under § 413.11 of this chapter before that date.(b)Scope. This part prescribes requirements for obtaining a reusable launch vehicle (RLV) mission license and post-licensing requirements with which a licensee must comply to remain licensed. Requirements for preparing a license application are contained in part 413 of this subchapter.(c)Equivalent level of safety. Each requirement of this part applies unless the applicant or licensee clearly and convincingly demonstrates that an alternative approach provides an equivalent level of safety to the requirement of this part.Doc. No. FAA-2019-0229, Amdt. 431-7, 85 FR 79717 , Dec. 10, 2020 83 FR 28535 , 8/20/2018; 85 FR 79717 , 3/10/2021