54. Fuel that has a sulphur content exceeding the following limits cannot be used in a stationary internal combustion engine:
(1) 1.5% (mass/mass) by weight for heavy fuel oil; or
(2) 0.5% (mass/mass) by weight for light fuel oil.
Despite the first paragraph, the operator of an existing stationary internal combustion engine may, until 30 June 2012, use heavy fuel oil that has a sulphur content exceeding 2% by weight.