63 Complaints to [employment tribunals]
63 Complaints to [employment tribunals]

(1)     An employee may present a complaint to an [employment tribunal] that his employer—

(a)     has unreasonably refused to permit him to take time off as required by section 61, or

(b)     has failed to pay the whole or any part of any amount to which the employee is entitled under section 62.

(2)     An [employment tribunal] shall not consider a complaint under this section unless it is presented—