Wyo. Stat. Ann. § 2-1-103

For appointments made pursuant to the Wyoming Probate Code, unless a shorter period of time is specified in the code or by the court, or where an appointment will be made with no hearing or no notice, all persons having an objection to the appointment of any person as a personal representative, administrator, executor, trustee, conservator, fiduciary or receiver shall file the objection in the court considering the appointment no less than five (5) days prior to any hearing scheduled to consider the appointment. A court may waive this requirement upon a showing of good cause.