Text in force at CS27-10: from CS27-0, effective 14 Nov 2003.
The suitability and durability of materials used for parts, the failure of which could adversely affect safety, must:
(a) Be established on the basis of experience or tests;
(b) Meet approved specifications that ensure their having the strength and other properties assumed in the design data; and
(c) Take into account the effects of environmental conditions, such as temperature and humidity, expected in service.
ED Decision 2003/015/RM · Source