Visa petitions are adjudicated by the appropriate District Director or Service Center Director of the DHS office having jurisdiction over the petition. Upon adjudication of a visa petition, revocation of a visa petition approval, or revalidation of a visa petition approval, the District Director or Service Center Director will notify the petitioner in writing of the decision. An appeal may be taken to the Board where authorized by statute and regulation. See 8 C.F.R. §§ 1003.1(b)(5), 1205.2(d). See also Chapter 1.4 (Jurisdiction and Authority).