Section 81.11 — Excise Tax Act: Sums not assessable

No assessment shall be made for any penalty or fine imposed pursuant to a conviction for an offence under this Act. Subject to subsections (3) to (5), no assessment shall be made for any tax, penalty, interest or other sum more than four years after the tax, penalty, interest or sum became payable under this Act. A variation of an assessment, or a reassessment, may be made at any time pursuant to subsection 81.15(4) or 81.38(1). An assessment in respect of any matter may be made at any time where the person to be assessed has, in respect of that matter, made a misrepresentation that is attributable to his neglect, carelessness or wilful default; or committed fraud in filing or making or failing to file or make a return, or in supplying or failing to supply any information, under this Act. An assessment in respect of any matter specified in a waiver filed pursuant to subsection (6) may be made at any time within the period specified in the waiver or, if a notice of revocation of the waiver has been filed pursuant to subsection (7), within the period commencing on the day on which the period specified in the waiver commences and ending six months after the day on which the notice is filed. Any person may, within the time otherwise limited by subsection (2) for assessing that person, waive the application of that subsection to him by filing with the Minister a waiver in the prescribed form specifying the period for which, and the matter in respect of which, the person waives the application of that subsection. Any person who has filed a waiver pursuant to subsection (6) may revoke the waiver on six months notice to the Minister by filing with the Minister a notice of revocation of the waiver in the prescribed form.