(1) The reference in section 15(1) to the annualised amount of the basic salary of a public servant is a reference to the annualised amount of such salary as it stands payable in consequence of -

(a) section 12(1), and

(b) subsection (1) and, as the case may be, subsection (3) of section 13.

(2) References in section 15(2) to the annualised amount of the basic salary of a public servant are references to the annualised amount of such salary as it stands payable in consequence of -

(a) section 12(1),

(b) subsection (1) and, as the case may be, subsection (3) of section 13, and

(c) section 15(1).

(3) The reference in section 15(3) to the annualised amount of the basic salary of a public servant is a reference to the annualised amount of such salary as it stands payable in consequence of -