Division 3 The allowance shall not exceed:

1. (a)

   10 % of net basic salary of the staff member concerned in the case of grades C to B4 inclusive;

2. (b)

   15 % of net basic salary in the case of grades B5 and B6, and A1 and A2.

Net basic salary shall be deemed to mean the actual basic salary as given in the annual scales agreed by the Board, but excluding any other additions to or deductions from remuneration.