To amend the Internal Revenue Code of 1986 to modify the credit to holders of clean renewable energy bonds.

Amends Internal Revenue Code provisions allowing a tax credit for holders of clean renewable energy bonds (CREBs) to: (1) extend the period for reimbursement of costs paid by CREB borrowers; (2) require ratable amortization of CREB principal; (3) revise the maximum term for maturity of such bonds; and (4) extend through 2009 the authority for issuing CREBs.