U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 14Chapter IPart 21Subpart E - Subpart E—Supplemental Type Certificates
§ 21.111 - Applicability.
§ 21.113 - Requirement for supplemental type certificate.
§ 21.115 - Applicable requirements.
§ 21.117 - Issue of supplemental type certificates.
§ 21.119 - Privileges.
§ 21.120 - Responsibility of supplemental type certificate holders to provide written permission for alterations.
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