(a) To refer one or more cases to a drug court magistrate, a district judge or judge of a statutory county court with criminal jurisdiction must issue an order of referral specifying the magistrate's duties.
(b) An order of referral may:
(1) limit the powers of the magistrate and direct the magistrate to report on specific issues and perform particular acts;
(2) set the time and place for the hearing;
(3) provide a date for filing the magistrate's findings;
(4) designate proceedings for more than one case over which the magistrate shall preside; and
(5) set forth general powers and limitations of authority of the magistrate applicable to any case referred.