Section 21.115 - [Effective 4/16/2024] Applicable requirements(a) Each applicant for a supplemental type certificate must show that the altered product meets applicable requirements specified in § 21.101 and- (1) In the case of an acoustical change described in § 21.93(b) , show compliance with the applicable noise requirements of part 36 of this chapter;(2) In the case of an emissions change described in § 21.93(c) , show compliance with the applicable fuel venting and exhaust emissions requirements of part 34 of this chapter; and(3) In the case of a fuel efficiency change described in § 21.93(d) , show compliance with the applicable fuel efficiency requirements of part 38 of this chapter.(b) Each applicant for a supplemental type certificate must meet §§ 21.33 and 21.53 with respect to each change in the type design.Amdt. 21-17, 32 FR 14927, Oct. 28, 1967, as amended by Amdt. 21-42, 40 FR 1033, Jan. 6, 1975; Amdt. 21-52A, 45 FR 79009, Nov. 28, 1980; Amdt. 21-61, 53 FR 3540, Feb. 5, 1988; Amdt. 21-68, 55 FR 32860, Aug. 10, 1990; Amdt. 21-71, 57 FR 42854, Sept. 16, 1992; Amdt. 21-77, 65 FR 36266, June 7, 2000