- 13 - 3.67 Methods of Instruction. Methods of instruction will be appropriate for vocational subjects. 4.0 STATE FISCAL PROCEDURES AND PRACTICES 4.1 Public Control of Funds. The State School Fund, the interest on which shall be exclusively applied to the support and maintenance of public free schools, shall be derived from.... The proceeds of all lands that have been or may hereafter be granted to the State by the United States for public school purposes, donations to the State when the purpose is not specified, appropriations by the State, the proceeds of escheated property or forfeitures, twenty-five per cent of the sales of public lands which are now or may hereafter be owned by the State. (Article XII, Section 4, State Constitution) Appropriations specifically for vocational education... shall be expended on the basis of requisitions approved by the state superintendent in accordance with regulations of the State Board. (Section 236. 15 F. S.) 4.2 Custody of Federal Funds. The state treasurer shall be the treasurer and custodian of all state funds for vocational educa- tion and other state funds for the public school program. He shall receive and provide for the proper custody and disburse- ment of these funds in accordance with the provisions of law. (Section 236.17 F. S.) 4.3 Prorating of Costs. Proration of costs of administration, research covering all fields, and salaries of staff members for vocational and non-vocational responsibilities are determined as equitably as possible among the several vocational services. These will be indicated in budgets or by written time assign- ments made by the state director. 4.4 Contracts and Agreements with Local Schools. Applications for reimbursement are submitted by local boards of public instruction, outlining the conditions of the request. After careful consideration by the state director and state super- visor, a written agreement confirming the allocation is furnished the local board, stipulating the conditions under which final reimbursement:will be forthcoming. 4.5 Claims for Reimbursement. 4.51 Content of Claims. Expenditures authorized by the director upon the recommendation of the respective state supervisors