42 CFR 84.1138 - Head harnesses; minimum requirements.
(a) All facepieces shall be equipped with head harnesses designed and constructed to provide adequate tension during use and an even distribution of pressure over the entire area in contact with the face.
(b) Facepiece head harnesses, except those employed on single-use dust, fume, and mist respirators, shall be adjustable and replaceable.
Title 42 published on 2014-10-01
no entries appear in the Federal Register after this date.