The parties are encouraged to engage in voluntary discovery procedures. Parties may seek an order compelling discovery only upon good cause shown. Discovery shall not be permitted where it will unduly delay the hearing, thereby resulting in prejudice to the public interest or the rights of the parties. Every request for discovery, objection to request for discovery, and request for admissions shall be in the form of a motion addressed to the hearing officer. In connection with any discovery procedure, the hearing officer may make any order required to protect a party or other person from annoyance, embarrassment, oppression, or undue burden or expense. Those orders may include limitations on the scope, methods, time and place for discovery, and provisions for protecting privileged information or documents. Where a party refuses to honor an order for discovery, the hearing officer may issue such orders in regard to the refusal as justice shall require. Each party shall bear its own expenses associated with discovery.