Regional Rail Reorganization Act Amendments - Requires that, in the course of the reorganization process under the Regional Rail Reorganization Act of 1973, attorneys employed by the Rail Services Planning Office of the Interstate Commerce Commission protect the interests of otherwise inadequately represented communities and rails service users.

Authorizes such office to hold public hearings on any supplement to the preliminary system plan.

Provides that upon determination that the reorganization of a railroad subject to reorganization under the Bankruptcy Act shall not be proceeded with pursuant to the Regional Rail Reorganization Act, the court having jurisdiction over such railroad may, upon petition, reconsider such order.

Increases from $85,000,000 to $282,000,000 the appropriation authorization for continuing essential rail services pending implementation of a final reorganization system plan.

Authorizes the Secretary to enter into interim agreements with railroads undergoing reorganization to perform program maintenance, to improve rail properties, and to acquire rail properties for lease or loan to any such railroad. Prescribes conditions for such agreements. Allows the United States Railway Association to issue up to $300,000,000 in obligations at any one time to finance such agreements. Requires the Consolidated Rail Corporation to assume such obligations.

Prohibits any railroad in reorganizaton from withholding from any State or political subdivision thereof the portion of taxes which the railroad has collected from any tenant.

Regional Rail Reorganization Act Amendments - Increases, under the Regional Rail Reorganization Act, the sum authorized to be appropriated to the United States Railway Association for loans to railroads and specified corporations for specified purposes. Provides for an increase from $85,000,000 to $185,000,000.

Provides that, prior to the date upon which rail properties are conveyed to the Consolidated Rail Corporation, the Secretary of Transportation, with the approval of the United States Railway Association, is authorized to enter in to agreements with the trustees of the railroads subject to bankruptcy proceedings: (1) to perform maintenance on designated rail properties until the date of conveyance; (2) to improve railroad facilities and equipment; and (3) to acquire railroad facilities or equipment for lease or loan.

States that such agreements shall contain such reasonable terms and conditions as the Secretary may prescribe.

Directs the Association to issue obligations to finance such agreements and requires the Corporation to assume any such obligations. States the aggregate amount of obligations outstanding at any one time shall not exceed $300,000,000.