The form, content, verification of, and other requirements for initiative, referendum and recall petitions, except as otherwise prescribed in this Charter, shall be those prescribed by the general laws of Ohio. In addition to the statutory requirements, each petition shall appoint a committee of three (3) to represent the proponents of the petition in any further proceedings before Council. Such committee shall have the power to fill vacancies in the committee by action of the surviving members. The petition shall be filed with Council. Council shall determine within thirty (30) days whether the petition is valid and sufficient according to law. If the petition is determined to be invalid or insufficient, no further action shall be had.