Section 37. A petition conforming to the requirements hereinafter provided and requesting the city council to pass a measure, except an order granted under section seventy or seventy-one of chapter one hundred and sixty-four or chapter one hundred and sixty-six, or requesting the school committee to pass a measure, therein set forth or designated, shall be termed an initiative petition, and shall be acted upon as hereinafter provided. In this and the eight following sections, “measure” shall mean an ordinance, resolution, order or vote passed by a city council, or a resolution, order or vote passed by a school committee, as the case may be.