AUGUSTA — Gov. John Baldacci Monday vetoed a bill meant to amend Maine’s school-district consolidation law hours after Senate passage.

The bill, L.D. 1932, would have allowed consolidating school districts to devise individual cost-sharing formulas to base individual towns’ tax contributions to their regional district on measures other than property value.

The bill also would have allowed districts that currently receive a minimum special education subsidy to continue to receive it when they consolidate and would have created a single budget format for all districts.

Legislators had also amended the bill to allow a “super union” school-district structure, a provision Baldacci opposed.

In a statement, Baldacci said such a structure “would encourage more bureaucracy and allow for the expansion of an inefficient means of school governance. Maine would likely end up with more school districts, not fewer.”

The school-district consolidation law, which legislators approved last year, was an effort to reduce districts’ administrative costs by cutting Maine’s 290 districts down to approximately 80.

The House passed the bill Friday, 83-47. The Senate voted 21-14 in favor of the bill on Monday.

Baldacci said he would file separate legislation to pass what he termed “the non-controversial elements of L.D. 1932” into law.