Any law to the contrary notwithstanding, the Leeds Water Works Board may collect voluntary donations on behalf of the Leeds Board of Education. The collection of the voluntary donations may include the collection of donations in the form of payments to the Leeds Water Works Board rounded up to the next highest dollar or otherwise as the water works board shall provide. The collections may be commenced only upon the request of at least 350 customers and shall be discontinued if the number requesting deductions falls below 250 customers. Any agreement for the collection of donations by the Leeds Water Works Board may include deductions for the reasonable costs of administering the collections and distribution of the donations for the Leeds Board of Education.