4.—(1) These Regulations apply for the purpose of the Textile Products (Indications of Fibre Content) Regulations 1986 for determining in the course of any official test the composition of any textile product comprising a binary textile fibre mixture or a ternary fibre mixture.
(2) In this regulation “official test” means a test carried out by or on behalf of a person whose duty it is to enforce the Textile Products (Indications of Fibre Content) Regulations 1986.