Registry of Out-of-State Custody Decrees and Proceedings. The clerk of the Commonwealth Trial Court shall maintain a registry in which the following shall be entered: (a) Certified copies of custody decrees of the states received for filing; (b) Communications as to the pendency of custody proceedings in other states; (c) Communications concerning a finding of inconvenient forum by a court of another state; and (d) Other communications or documents concerning custody proceedings in another state which may affect the jurisdiction of the Commonwealth Trial Court or the disposition to be made by it in a custody proceeding. Source: PL 3-50, § 17. Commission Comment: Section 4 of PL 6-25, the “Commonwealth Judicial Reorganization Act of 1989,” provides that “[w]herever the term ‘Commonwealth Trial Court’ appears in the Commonwealth Code, it is henceforth to be interpreted and understood to refer to the Commonwealth Superior Court.”