Where, at the time he would (apart from this section) become entitled to be discharged under section 16, a man is in permanent service or F1full-time service under a full-time service commitmentF1service under a section 24 commitment, he shall not be entitled to be discharged until he is released from that service.

Where, at the time when a man not in permanent service or F2full-time service under a full-time service commitmentF2service under a section 24 commitment would (apart from this section) become entitled to be discharged under section 16(1), an order under section 52 is in force authorising the call out of members of any reserve force, he may be required to prolong his service for such further term, not exceeding 12 months, as the Defence Council or an authorised officer may order.

In subsection (2) “authorised officer” means an officer authorised by or in accordance with directions of the Defence Council to exercise the power conferred by that subsection.

Where, at the time when a man not in permanent service or F3full-time service under a full-time service commitmentF3service under a section 24 commitment would (apart from this section) become entitled to be discharged under section 16(2), an order under section 52 or 54 is in force authorising the call out of members of any reserve force, he shall not be entitled to be so discharged while that call-out order is in force.