(1) Part I of Schedule 1 to the principal Regulations (list of prescribed diseases and related occupations) shall be amended in accordance with paragraph (2) below in relation to the occupations set against the disease numbered A10 (occupational deafness) in the second column of that Schedule.
(2) For sub-paragraphs (a), (b), (c), (d) and (e), there shall be substituted the following sub-paragraphs:—
(a) the use of powered (but not hand powered) grinding tools on cast metal (other than weld metal) or on billets or blooms in the metal producing industry, or work wholly or mainly in the immediate vicinity of those tools whilst they are being so used; or
(b) the use of pneumatic percussive tools on metal, or work wholly or mainly in the immediate vicinity of those tools whilst they are being so used; or
(c) the use of pneumatic percussive tools for drilling rock in quarries or underground or in mining coal, or work wholly or mainly in the immediate vicinity of those tools whilst they are being so used; or
(d) work wholly or mainly in the immediate vicinity of plant (excluding power press plant) engaged in the forging (including drop stamping) of metal by means of closed or open dies or drop hammers; or
(e) work in textile manufacturing where the work is undertaken wholly or mainly in rooms or sheds in which there are machines engaged in weaving man-made or natural (including mineral) fibres or in the high speed false twisting of fibres; or