Section 297.22 shall be construed as independent of the power vested in the electors by section 278.1, and as additional to such power. If a board of directors has exercised its independent power under section 297.22 regarding the disposition of real or personal property of the school district and has by resolution approved such action, the electors may subsequently proceed to exercise their power under section 278.1 for a purpose directly contrary to an action previously approved by the board of directors in accordance with section 297.22. However, the electors shall be limited to ten days after an action by the board to exercise such power for a purpose directly contrary to the board’s action.