7.—(1) In addition to the amendments made by Part I of these Regulations (relating to metrication) the Flax and Tow Spinning and Weaving Regulations 1906(1) shall be amended in accordance with the following paragraphs of this regulation.

(2) In the preliminary part of the Regulations dealing with definitions, after the words “In these Regulations” there shall be inserted at the appropriate places the following definitions—

““Dry bulb temperature” means the temperature measured by an accurate and properly maintained thermometer (which may form part of the hygrometer) and any reference in these Regulations to a dry bulb thermometer or without qualification to a “thermometer” shall be taken to be a reference to such a thermometer and a reference without qualification to temperature shall be taken to be a reference to the dry bulb temperature.

“Hygrometer” means an accurate and properly maintained and calibrated instru ment for the measurement of the relative humidity in the work-place.

“Wet bulb temperature” means either—

and any reference in these Regulations to the reading of the wet bulb thermometer shall be treated as a reference to the wet bulb temperature.”.

(3) For regulation 4 there shall be substituted the following regulation—

“4.—(1) In every room in which wet spinning is carried on, or in which artificial humidity is produced in aid of manufacture a hygrometer and a thermometer close to the hygrometer shall be positioned in the centre of the room or in such other position as may be directed by an inspector by notice in writing.

(2) The hygrometer and the thermometer shall be read between 10 and 11 a.m. on every day that any person is employed in the room and again between 3 and 4 p.m. on every day that any person is employed in the room agter 1 p.m. and a record of all such readings shall be kept.

(3) The said record shall be kept by the occupier for at least two years from when it was made and the occupier shall give his employees immediate access to those records on request together with such information as is necessary for their interpretation.”.

(4) There shall be inserted the following regulation as regulation 12—

“12.—(1) Subject to paragraph (2) of this Regulation, the Health and Safety Executive may, by a certificate in writing, exempt any person or class of persons, from all or any of the requirements or prohibitions imposed by these Regulations and any such exemption may be granted subject to conditions and to a limit of time and may be revoked by a certificate in writing at any time.

(2) The Executive shall not grant any such exemption unless, having regard to the circumstances of the case and in particular to—

(a)the conditions, if any, that it proposes to attach to the exemption; and

(b)any requirements imposed by or under any enactments which apply to the case,

it is satisfied that the health or safety of persons who are likely to be affected by the exemption will not be prejudiced in consequence of it.”.