A proceeding under this part may be commenced:
(1) By transfer of a case from another court as provided in § 37-1-109;
(2) As provided in § 37-1-146 in a proceeding charging the violation of a traffic offense;
(3) By the court accepting jurisdiction as provided in § 37-1-141 or accepting supervision of a child as provided in § 37-1-143; or
(4) In other cases by the filing of a petition as provided in this part. The petition and all other documents in the proceeding shall be entitled “In the matter of _________ , a child under eighteen (18) years of age.”
Acts 1970, ch. 600, § 8; T.C.A., § 37-208.