The governing board of any school district may appoint an executive committee. In the case of a governing board which has appointed a clerk, the committee shall consist of the president, the clerk, and one other member of the board. In the case of a governing board which has not appointed a clerk the committee shall consist of the president and two members of the board. The committee shall attend to the routine business of the board. Its action shall be reported to the board for ratification at its first meeting ensuing.