(1) Where an employee's working hours are assessed as provided in section 8(1)(b) but are not normally controlled by his or her employer, the following shall apply:

(a) the employee shall keep a written record of his or her working hours during every day he or she is employed during a pay reference period;

(b) the employee shall give the record to his or her employer as soon as reasonably practicable after the end of the pay reference period;

(c) if the employee fails to comply with paragraph (b), the working hours of the employee shall be calculated in accordance with section 8(1)(a) and the employer shall notify the employee of that circumstance as soon as possible after the expiration of the period, but in any case not later than at the time of receipt by the employee of his or her pay for the working hours concerned.