N.Y. Education Law § 1724
* 1. No claim against a central school district or a union free school district, except for compensation for services of an officer or employee engaged at agreed wages by the hour, day, week, month or year or for the principal of or interest on indebtedness of the district, shall be paid unless an itemized voucher therefor approved by the officer whose action gave rise or origin to the claim, shall have been presented to the board of education of the district and shall have been audited and allowed; provided, however that in the case of a school district with a public school enrollment of ten thousand students or more, the board of education may, at its discretion, use a risk-based or sampling methodology to determine which claims are to be audited in lieu of auditing all claims so long as it is determined by resolution of the board of education that the methodology for choosing the sample provides reasonable assurance that all the claims represented in the sample are proper charges against the school district. The board of education shall be authorized, but not required, to prescribe the form of such voucher. * NB Effective until July 1, 2014 * 1. No claim against a central school district or a union free school district, except for compensation for services of an officer or employee engaged at agreed wages by the hour, day, week, month or year or for the principal of or interest on indebtedness of the district, shall be paid unless an itemized voucher therefor approved by the officer whose action gave rise or origin to the claim, shall have been presented to the board of education of the district and shall have been audited and allowed. The board of education shall be authorized, but not required, to prescribe the form of such voucher. * NB Effective July 1, 2014