1.—In this Act—

“a day’s pay” means—

(a) in relation to a person who is convicted by a court-martial of an offence against military law or whose case is being dealt with summarily under Chapter IV of Part V of the Principal Act and who is a member of the Defence Forces, the basic pay, excluding any additional pay or allowance, that is, or would be, payable to that person in respect of the day on which punishment is awarded in respect of the offence, or

(b) in relation to a person convicted of an offence against military law who is not a member of the Defence Forces but who was a member of the Defence Forces when the offence was committed, the basic pay, excluding any additional pay or allowance, that would be payable to that person in respect of the day on which punishment is awarded in respect of the offence if he were a member of the Defence Forces on that day and his rank and service (or service in rank, if appropriate) were the same as those on the last day of his service in the Defence Forces;

“the Principal Act” means the Defence Act, 1954.