(1) A is,(a) if an election under section 49 or 64 of the Selected Listed Financial Institutions Attribution Method (GST/HST) Regulations, or under section 433.19.1 or 433.19.11 of the Act, in respect of the series, is in effect throughout the fiscal year, the financial institution’s percentage for the series and as regards Québec as of the earliest day in the particular reporting period for which that percentage is required to be determined for the purposes of section 433.16.2 of the Act or, if no such day exists, as of the last day before the particular reporting period for which that percentage is required to be determined for the purposes of that section;
(b) if an election under section 50 of the Selected Listed Financial Institutions Attribution Method (GST/HST) Regulations, or under section 433.19.4 of the Act, is in effect throughout the fiscal year, other than for determining the interim net tax of the financial institution for the particular reporting period under the third paragraph of section 437.1 of the Act, the financial institution’s percentage for the series and as regards Québec for the particular taxation year that is required to be determined for the purposes of section 433.16.2 of the Act; and
(c) in any other case, the financial institution’s percentage for the series and as regards Québec for the taxation year preceding the particular taxation year that is required to be determined for the purposes of section 433.16.2 of the Act;