(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]
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