Mass. Gen. Laws ch. 35, § 28B
(a) In every county other than Suffolk and Nantucket, there shall be an advisory board on county expenditures consisting of the city manager or his designee, who must be a member of the city council or board of alderman in a Plan D or Plan E city, or the mayor or his designee, who must be a member of the city council or board of alderman in each other city, or any member of the board of selectmen of each town or any member of the town council in a town which does not have selectmen. Each city and town shall have a weighted vote based on that city or town's assessment for expenses of county government. Each city or town's weighted vote will be computed based on the most recent biennial report of the commissioner of revenue submitting the final equalization and apportionment upon the several cities and towns of the amount of property and the proportion by every one thousand dollars of state or county tax which should be assessed upon each city and town and assessment ratios for classes of property in each city and town under section ten C of chapter fifty-eight.
Said vote shall be determined by dividing that city or town's property valuation by the total of the county property value to the nearest one hundredth in accordance with the schedule in the commissioner of revenue's most recent biennial report referenced above. Said vote shall be determined by the director of accounts and delivered in writing to the advisory board thirty calendar days after the biennial report has been accepted by the general court.
A quorum of the advisory board shall consist of that number of persons who represent a majority of the aggregate weighted vote. A majority shall be defined for the purposes of this chapter as a majority of the quorum.
(h) At the closing of the treasurer's books on July tenth, the balance to the credit of each appropriation shall become a part of the general unappropriated balance in the county treasury, but no appropriation voted for special, non-operating purposes, shall lapse until the work for which it has been made has been completed. Such appropriation, however, may not be carried forward for more than one extra fiscal year. Any remaining unappropriated balance thereafter, shall become a part of the general unappropriated balance in the county treasury. Written notification of such balance to be carried forward shall be submitted by the county commissioners to the county treasurer, the advisory board, and the director of accounts on or before the tenth day following the close of the fiscal year for which it was originally appropriated.
The county commissioners shall send written notification of such balance to the county treasurer, the advisory board, and the director of accounts on or before the tenth day following the close of the fiscal year. This subsection shall not apply to funds appropriated for the purposes of construction of buildings.
(i) For the purpose of creating a Capital Improvement Fund the advisory board may appropriate in any year an amount not exceeding ten per cent of the amount raised in the preceding fiscal year by assessment upon the cities and towns or of such larger amount as may be approved by a two-thirds vote. The aggregate amount in the fund at any time shall not exceed ten per cent of the total equalized valuation of the municipalities in the county as defined in section one of chapter forty-four. Any interest shall be added to and become a part of the fund.
The treasurer shall be the custodian of said fund and may deposit the proceeds in national banks or invest the proceeds by deposit in savings banks, cooperative banks or in participation units in a combined investment fund under section thirty-eight A of chapter twenty-nine, or invest the same in such securities as are legal for the investment of funds of savings banks under the provisions of chapter one hundred and sixty-eight or in federal savings and loan associations situated in the commonwealth.
The Capital Improvement Fund may be appropriated by the county commissioners with the approval of the advisory board for any purpose authorized under sections seven and eight of chapter forty-four or for such other county purpose as is approved by a two-thirds vote of the advisory board.
(j) To create and maintain a County Stabilization Fund the advisory board may appropriate in any year an amount as may be approved by a 2/3 vote of the advisory board. Any interest shall be added to and become part of the fund.
The treasurer shall be custodian of the fund and may deposit the proceeds in national banks or invest the proceeds by deposit in savings banks, cooperative banks or in participation units in a combined investment fund under section 38A of chapter 29, or invest the proceeds in those securities as are legal for the investment of funds of savings banks under chapter 168 or in federal savings and loans associations situated in the commonwealth.
The County Stabilization Fund may be appropriated for any purpose by the county commissioners with the approval of a 2/3 vote of the advisory board.