Section 366 - Unanticipated revenues; unappropriated cash surplus1. The board of supervisors by resolution pursuant to section three hundred sixty-three may at any time appropriate for any lawful purpose the unanticipated revenues or unappropriated unreserved fund balance within a particular fund, but only to the extent, in each case, that the total of all revenues of such fund recognized or reasonably expected to be recognized in the fiscal year, together with unappropriated unreserved fund balance, exceeds the total of all revenues of such fund as estimated in the budget, including appropriated fund balance.2. Notwithstanding the provisions of subdivision one of this section, grants in aid from the state and federal governments, other gifts which are required to be expended for particular objects or purposes and insurance proceeds for the loss, theft, damage or destruction of real or personal property, when proposed to be used or applied to repair or replace such property, may be appropriated by resolution of the board of supervisors at any time for such objects or purposes.