Exception to requirement to have approval
4Despite any other provision of this Part, if the sulphur dioxide (SO2) emissions released into the environment are less than 10 tonnes per year and the particulate matter (PM) emissions released into the environment are less than 10 tonnes per year, no approval is required for fuel burning equipment utilized solely for the purpose of generating heat or steam in which the fuel burned is No. 2 fuel oil, natural gas, propane, butane or wood.