A bill to amend the Internal Revenue Code of 1954 to provide an additional 3 years for the completion of certain requirements necessary for the extension through 1990 of the energy investment tax credit for long-term projects.

Amends the Internal Revenue Code, with respect to application of the energy percentage for purposes of the investment tax credit, to extend by three years the periods for completion of certain engineering and construction requirements necessary for the extension through 1990 of such credit for long-term projects.