Non-attendance for duty. Except as provided for elsewhere in this Agreement (ie. approved leave or in accordance with clause 84 or clause 34, employees may not be entitled to be paid for their time of non- attendance for duty. Any instance of non-attendance for duty is to be considered on a case by case, shift by shift basis. In the case of workings which involve a forward and return journey, only the forward shift is to be counted as non-attendance. The deduction in payment may occur within the fortnightly pay period in which the employee was absent from duty. If employees are able to make up deducted hours or part thereof on that same day or later on during the work cycle, payment for such hours will be made at the end of the appropriate pay period.