Other than in those counties in which the legislature has adopted a presumption of open hearings, hearings under RSA 169-C are closed to the public. In those counties in which hearings under this chapter are presumed open, parties to the action must inform the court in writing before any hearing, or orally and on the record at the beginning of any hearing, if they believe the hearing should be closed to the public, in full or in part. See Chapter Law 134 (2006) pertaining to open hearings in Grafton, Rockingham and Sullivan Counties.