Sec. 1. 20-A MRSA §1301, sub-§1, as amended by PL 1993, c. 696, §1, is further amended to read:

1. Methods of sharing costs. The costs of operating a school administrative district shall must be shared among all municipalities within the district in one of the following ways.

A. Under a property valuation method, municipalities in a district shall share costs in the same proportion as each municipality's fiscal capacity as defined in section 15603, subsection 11-A is to the district's fiscal capacity.

B. Under an alternate plan approved by the state board and by a vote of the legislative bodies of the school administrative units forming the district and based on:

(1) The number of resident pupils in each town;

(2) The fiscal capacity of each member municipality as defined in section 15603, subsection 11-A; or

(3) Any combination of subparagraphs (1) and (2).; or

(4)__Any other factor or combination of factors that may, but need not, include subparagraphs (1) and (2).

C. Notwithstanding paragraphs A and B and for fiscal year 1992-93 only, the state valuation and resident pupil information used to calculate the shared cost for each municipality must be the same as the information used for fiscal year 1991-92.

D. Notwithstanding paragraphs A and B, Title 30-A, chapter 208-A or any other provision of law, the state valuation used to calculate the shared cost for each municipality in a district with a municipal incentive development zone must include the increase in equalized just value of all industrial and commercial property located in the zone over the assessed value.

Sec. 2. 20-A MRSA §1301, sub-§3, as amended by PL 1991, c. 379, is further amended to read:

3. Amendment of cost-sharing formulas. The cost-sharing formula may be amended as follows.

A. If requested by a written petition of at least 10% of the number of voters voting in the last gubernatorial