Section 17B. Deductions on pay-roll schedules may be made from the salary of any town, county or state employee of any amount which such employee may specify in writing to the officer, or the head of the department, board or commission, by whom or which he is employed, for the payment of a contribution to a community chest or united fund, or to scholarship and other fundraising initiatives that benefit a public institution of higher education, its affiliates and foundations as listed in section 5 of chapter 15A. Any such authorization may be withdrawn by the employee by giving at least sixty days’ notice in writing of such withdrawal to the officer, or the head of the department, board or commission, by whom or which he is then employed. The treasurer of the town, county or state shall deduct from the salary of such employee such amount of contribution as may be certified to him on the pay-roll and transmit the sum so deducted to the community chest or united fund, or to scholarship and other fundraising initiatives that benefit a public institution of higher education, its affiliates and foundations as listed in section 5 of chapter 15A; provided, that the town, county or state treasurer is satisfied by such evidence as he may require that the treasurer of such community chest or united fund has given to said community chest or united fund a bond, in a form approved by the commissioner, for the faithful performance of his duties, in a sum and with such surety or sureties as are satisfactory to the town, county or state treasurer.