Minn. R. Juv. P. 10.03
The prosecuting attorney shall advise child's counsel of evidence of any additional offenses that may be offered at the trial under any exclusionary rule exceptions. Such additional acts shall be described with sufficient particularity to enable the child to prepare for the trial. The notice need not include offenses for which the child has been previously prosecuted, or that may be offered in rebuttal of character witnesses for the child or as a part of the occurrence or episode out of which the charges against the child arose. Notice of additional offenses shall be given at or before the pretrial or omnibus hearing or as soon after those hearings as the offenses become known to the prosecutor. If there is no pretrial or omnibus hearing, the notice shall be given at least seven (7) days before the trial.
Minn. R. Juv. P. 10.03