Minn. R. Adop. P. 6.03
Subd. 1. Notice to Remove. A party may file with the court and serve upon all other parties a notice to remove a particular referee. The notice shall be served and filed within ten (10) days of the date the party receives notice of the name of the referee who will preside at the hearing or trial, but not later than the commencement of the hearing or trial. A notice to remove may not be filed by a party against a referee who has presided at a motion or at any other proceeding in the matter of which the party had notice. A referee who has presided at a motion or other proceeding may not be removed except upon an affirmative showing of prejudice on the part of the referee. A judge shall rule on a motion to remove a referee who has already presided over the proceeding.
Subd. 2. Prejudice. If a party has once disqualified a referee as a matter of right, that party may disqualify the substitute referee, but only upon an affirmative showing of prejudice. A showing that the referee might be excluded for bias from acting as a juror in the matter constitutes an affirmative showing of prejudice. A judge shall rule on a motion to remove a substitute referee.
Subd. 3. Assignment of Another Referee. Upon the filing of a notice to remove a particular referee, or if a party makes an affirmative showing of prejudice against a substitute referee, the chief judge of the judicial district shall assign another juvenile court referee or a judge to hear the matter.
Minn. R. Adop. P. 6.03
A party may not remove a particular referee and then object to having the case heard by any referee. .