(6) Municipal courts or district courts may enter into interlocal agreements for pretrial and/or postjudgment probation supervision services pursuant to ARLJ 11. Such agreements shall not affect the jurisdiction of the court that imposes probation supervision, need not require the referral of all supervised cases by a jurisdiction, and may limit the referral for probation supervision services to a single case. An agreement for probation supervision services is not valid unless approved by the presiding judge of each participating court. The interlocal agreement may not require approval of the local executive and legislative bodies unless the interlocal agreement requires the expenditure of additional funds by the jurisdiction. If the jurisdiction providing probation supervision services is found liable for inadequate supervision, as provided in RCW 4.24.760(1), or is impacted by increased costs pursuant to the interlocal agreement, the presiding judge of the jurisdiction imposing probation supervision shall consult with the executive authority of the jurisdiction imposing probation supervision and determine whether to terminate the interlocal agreement for probation supervision services. All proceedings to grant, modify, or revoke probation must be held in the court that imposes probation supervision. Jail costs and the cost of other sanctions remain with the jurisdiction that imposes probation supervision. The administrative office of the courts, in cooperation with the district and municipal court judges association and the Washington association of prosecuting attorneys, shall develop a model interlocal agreement.