(1) In order to take account of acquisition expenses, the maximum annual premium to be valued under Article 29 may (subject to paragraph (2)) be increased by an amount not greater than the equivalent, taken over the whole period of premium payments and calculated according to the rates of interest and rates of mortality or disability employed in valuing the contract, of 3.5 per cent (or the defined percentage, if it is lower than 3.5 per cent) of the relevant capital sum under the contract.
(2) For the purposes of paragraph (1) "the defined percentage" is the percentage arrived at by taking (for all contracts of the same type as the contract in question for which an adjustment is made) the average of the percentages of the relevant capital sum under each such contract that represent the acquisition costs for which, after allowing for the effects of taxation, allowance is made in the premiums.
(3) The increase permitted by paragraph (1) shall be subject to the limitation that the a