At noon of the day appointed for convening the legislature, the members shall meet in their respective chambers. The lieutenant governor shall call the senate to order and the secretary of state, the house of representatives. In the absence of either officer, the oldest member present shall act in the officer's place. The person so acting shall appoint, from the members present, a clerk pro tem, who shall call the legislative districts in the order of their numbers. As each is called, the persons claiming to be members from each shall present their certificates to be filed. All whose certificates are so presented shall then stand and be sworn.