26.20 Availability of judge for hearings in chambers.—In circuits having more than one circuit judge, at least one of said judges shall be available as nearly as possible at all times to hold and conduct hearings in chambers. In each circuit, there must be at least one judge available on Saturdays, Sundays, holidays, and after hours on weekdays to hear motions for a temporary injunction ex parte in domestic violence cases. The chief judge may assign a judge for this purpose.