If the claimant claims the credit under section 47 of the Internal Revenue Code for the same rehabilitation, evidence that the rehabilitation was recommended by the state historic preservation officer for approval by the secretary of the interior under 36 CFR 67.6 before the physical work of construction, or destruction in preparation for construction, began and that the rehabilitation was approved by the state historic preservation officer. If the claimant does not claim the credit under section 47 of the Internal Revenue Code for the same rehabilitation, evidence that the rehabilitation was approved by the state historic preservation officer before the physical work of construction, or destruction in preparation for construction, began.