(a)
for each product for which a type-certificate or a change to a type-certificate is requested, establish and notify the type-certification basis. That certification basis consists of the applicable airworthiness code, the provisions for which an equivalent level of safety has been accepted and the special detailed technical specifications necessary when the design features of a particular product or the experience in operation render any of the airworthiness code provisions inadequate or inappropriate to ensure conformity with essential requirements;
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Source: EUR-Lex (Cellar) · retrieved 2026-10-29 · Text as adopted (Official Journal); later amendments are not incorporated in this text.