Division 4.1 Thermal cycles prior to a test for compliance with the oil retention requirement referred to in point 4 under PFC 1(C)(I)(a)(i-ii)(A) in Annex I United Kingdom Original text. Later amendments are not shown. 4.1.1Principle and definition 4.1.2Apparatus 4.1.3Procedure ← Division 4 Division 4.1 Division 4.1.1 →