The State Treasurer shall act as custodian of funds received by and allotted to the State Department of Health and to the State Commissioner of Health by federal agencies, when requested to do so by such federal agencies; and the State Budget Director shall maintain a system of accounts for such funds, and each allotment of funds shall be kept and accounted for as a separate fund. Such funds shall be disbursed in the same manner as state appropriated funds, except as may otherwise be requested by the federal agency allotting the funds disbursed. Grants and donations from other sources for public health purposes shall be similarly kept, accounted for or disbursed if believed by the State Commissioner of Health to be necessary or convenient to accomplish the purposes for which the grants or donations were made.