Section 33.1 - Applicability(a) This part prescribes airworthiness standards for the issue of type certificates and changes to those certificates, for aircraft engines.(b) Each person who applies under part 21 for such a certificate or change must show compliance with the applicable requirements of this part and the applicable requirements of part 34 of this chapter.Amdt. 33-7, 41 FR 55474, Dec. 20, 1976, as amended by Amdt. 33-14, 55 FR 32861, Aug. 10, 1990