National Defense Desert Storm Supplemental Authorization Act for Fiscal Year 1991

National Defense Desert Storm Supplemental Authorization Act for Fiscal Year 1991 - Title X: Supplemental Authorization of Appropriations for Operation Desert Storm - Extends through FY 1992 the authorization of appropriations to the Defense Cooperation Account (Account) and the Persian Gulf Working Capital Account for payment of costs associated with Operation Desert Storm (the Operation). Renames the Persian Gulf Working Capital Fund the Persian Gulf Regional Defense Fund (Fund).

Authorizes additional appropriations for: (1) FY 1991 and 1992 for procurement; (2) FY 1991 for research, development, test, and evaluation; and (3) FY 1991 and 1992 for operation and maintenance and working capital funds. Authorizes appropriations for FY 1991 for military personnel, Army National Guard. Provides additional transfer authority from other appropriation accounts. Requires amounts expended from the Fund to be replenished to the extent possible from amounts available in the Account. Requires monthly reports concerning such transfers.

Amends the Persian Gulf Conflict Supplemental Authorization and Personnel Benefits Act of 1991 to include Operation Provide Comfort within the definition of Operation Desert Storm for purposes of eligibility for appropriations under such Act.