206.0.1. In determining an input tax refund of a registrant that is a pension entity within the meaning of section 289.2, no amount may be included, for a reporting period, in respect of the tax payable by the pension entity in respect of a supply, unless the pension entity has included an amount in respect of the supply in determining an input tax credit under the Excise Tax Act (R.S.C. 1985, c. E-15).