4. After section 24 of the Principal Act the following section is inserted:
“24A. (1) Where a person—
(a) ceases to be a member of the Brigade pursuant to subsection 24 (1); and
(b) immediately before so ceasing was a contributor to the Superannuation Fund established under the Superannuation Act;
that person is entitled to a benefit of an amount ascertained in accordance with the formula A x B x 0.017 where—
(c) A is the final annual rate of salary of the person; and
(d) B is the number of completed years of continuous service with the Brigade.
“(2) Where, prior to the person becoming a member of the Brigade, the person had—
(a) a relevant period of service that was continuous with his or her service with the Brigade; or
(b) 2 or more relevant periods of service that were continuous with each other and with his or her service with the Brigade;
that relevant period of service or those relevant periods of service shall, for the purpose of paragraph (1) (d), be taken to be a continuous period of service with the Brigade.
“(3) In this section—
(a) a period of service with a body that performs, in a State or another Territory, functions similar to those of the Brigade; or
(b) a period of service with the Brigade or with a body that performed similar functions in the Territory before the establishment of the Brigade;