Section 5.1 - ApplicabilityThis part applies to all of the following:
(a) Any person that holds or applies for a certificate issued under part 119 of this chapter authorizing the person to conduct operations under part 121 of this chapter.(b) Any person that holds or applies for a certificate issued under part 119 of this chapter authorizing the person to conduct operations under part 135 of this chapter.(c) Any person that holds or applies for a Letter of Authorization issued under § 91.147 of this chapter.(d) Any person that holds both a type certificate and a production certificate issued under part 21 of this chapter for the same product.(e) Any person that holds a production certificate issued under part 21 of this chapter for a product for which the person is a licensee of the type certificate for the same product.(f) Any person that applies for a production certificate under part 21 of this chapter for a product for which the person is the holder or licensee of the type certificate for the same product.(g) Any person that holds a type certificate issued under part 21 of this chapter for a product, except for persons that hold only type certificates issued under § 21.29 of this chapter, that allows another person to use the type certificate to manufacture the same product under a production certificate.80 FR 1326, Jan. 8, 2015, as amended at 80 FR 1584, Jan. 13, 2015