(1)Â Â Â Â [Unless his employer has first obtained the worker's agreement in writing to perform such work], a worker's working time, including overtime, in any reference period which is applicable in his case shall not exceed an average of 48 hours for each seven days.
(2)Â Â Â Â An employer shall take all reasonable steps, in keeping with the need to protect the health and safety of workers, to ensure that the limit specified in paragraph (1) is complied with in the case of each worker employed by him in relation to whom it applies [and shall keep up-to-date records of all workers who carry