Computation of temporary development levy
3.   The amount of temporary development levy payable under section 40A of the Act in respect of any development of land to be authorised by a temporary permission shall be determined in accordance with the formula (A — B) x C
where
A
 
is the value of the Development Ceiling for the land determined in accordance with the formulae and rates prescribed in the Planning (Development Charges) Rules (R 5) subject to the modification that the reference to a written permission in the formula in rule 4(1)(b) of those Rules shall be read as a reference to the temporary permission;
 
B
 
is the value of the Development Baseline for the land determined in accordance with the formulae and rates prescribed in the Planning (Development Charges) Rules; and
 
C
 
is the applicable percentage set out in the Schedule corresponding to the period of the temporary permission.