Washing of nightwear prior to testing
11. Before being tested for compliance with the flammability performance requirements–
(a)any fabric treated with chemicals to make it safer from fire shall be washed using the procedure specified in clause 6.5.2 of BS 5651;
(b)any fabric not so treated shall be washed using the same procedure, except that the requirements of clause 6.5.2.7 of BS 5651 shall not be observed.