In any case in which any person placed on parole or postrelease period of supervision by Virginia is present in another state, if such person is not present in such other state pursuant to the provisions of Article 6 (§ 53.1-176.1 et seq.) of Chapter 4 of this title, upon request by the compact administrator of Virginia or his designee, the appropriate judicial or administrative authorities of such other state in which such person is present, having jurisdiction to conduct preliminary hearings to determine probable cause for violation of conditions of parole or postrelease period of supervision, shall cause to be conducted a preliminary hearing to determine probable cause for violation of conditions of parole. Such preliminary hearing shall be substantially similar to the hearing provided for in §§ 53.1-168 through 53.1-172. A decision thereon shall be conclusive and shall not be reviewable within or by Virginia.