42.0.21. Despite sections 42.0.12, 42.0.13 and 42.0.17, where a person has made an election under subsection 27 of section 141.02 of the Excise Tax Act (R.S.C. 1985, c. E-15) for a fiscal year to use particular methods described in an application filed by the person under subsection 18 of section 141.02 of that Act to determine the operative extent and the procurative extent of each of the business inputs of the person, and where the conditions of subsections 27 and 28 of section 141.02 of that Act are met, the particular methods must be used for the fiscal period.
The election referred to in the first paragraph in respect of a fiscal year of the person ceases to have effect at the beginning of the fiscal year and is deemed never to have been made for the purposes of this Title if, under subsection 30 of section 141.02 of the Excise Tax Act, the election ceases to be in force at the beginning of the fiscal year and is deemed never to have been made for the purposes of Part IX of that Act.