360R68. For the purposes of section 360R66, the earned depletion base of a taxpayer in respect of an oil or gas well is(a) where an agreement described in section 360R69 has been filed with the Minister in respect of the well by the taxpayer and one or more other persons, the amount allocated to the taxpayer under the agreement;
(b) where no amount has been allocated to the taxpayer in the agreement referred to in paragraph a or where an agreement described in section 360R69 has been filed with the Minister in respect of the well by one or more persons other than the taxpayer, nil; or
(c) where no agreement referred to in paragraph a or b has been filed with the Minister in respect of the well, $5,000,000.