6. In regulation 4(2), paragraphs (a) and (b) shall be replaced by the following paragraphs:
“(a)outside Special Areas, 0.1 per cent by weight and until the tank is empty, with the exception of phosphorus, yellow or white, for which the residual concentration shall be at 0.01 per cent by weight;
(b)inside Special Areas, 0.05 per cent by weight and until the tank is empty, with the exception of phosphorus, yellow or white, for which the residual concentration shall be at 0.005 per cent by weight.”.