# The Coal and Other Mines (Ventilation) Order 1956, Paragraph 11


(1) The manager of every mine at which detectors are required to be provided shall—
(a) make arrangements to secure that detectors are in use at the places and in the numbers specified in, and otherwise in compliance with, the three next following regulations;
(b) appoint competent persons and make arrangements to secure that each detector required to be in use is in the personal charge of such a person.
(2) In any prosecution for a contravention of this regulation it shall be a defence to prove that the manager has made the necessary arrangements for the training of a sufficient number of persons and made reasonable efforts to induce appropriate persons to be trained and that the failure to comply fully was due to an insufficiency of trained persons willing to take charge of detectors at that mine.
(3) In the case of any person appointed under this regulation who may be in charge of a detector which is a flame safety-lamp, his competence to recognise actual gas caps as they appear on the lowered flame of the lamp shall be certified by such person and in such form as the Minister may direct.

---
Source: https://www.legislation.gov.uk/uksi/1956/1764/schedule/FIRST/paragraph/11 (the official version)
Page: https://openlegislation.uk/coal-and-other-mines-ventilation-order-1956/schedule-FIRST/paragraph-11
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.