Federal interest means, for purposes of Sec. 200.329 Reporting on real property or when used in connection with the acquisition or improvement of real property, equipment, or supplies under a Federal award, the dollar amount that is the product of the:
(a) Federal share of total project costs; and
(b) Current fair market value of the property, improvements, or both, to the extent the costs of acquiring or improving the property were included as project costs.