The regular election for the choice of members of the council, as provided in Section 3.01 of Article III of this charter, and all City elections shall be governed, except as otherwise provided by this charter, by the laws of the State of Texas governing general and municipal elections. The council may by resolution order a special election, fix the time for holding same, and provide all means for holding such special election. In event there should be any failure of the general laws or this Charter to provide for some feature of the City elections, then the City Council shall have the power to provide for such deficiency. No informalities in conducting a City election shall invalidate the same, if it be conducted fairly and in substantial compliance with the general laws, where applicable, and the charter and ordinances of the City.