Minn. R. Adop. P. 33.05
With the exception of cases where a person receives notice under Minnesota Statutes § 259.24, subd. 2a, if a biological parent whose consent is required under Rule 33 does not execute a consent by the end of the period specified in Rule 33.04, the child placing agency shall notify the court and the court shall issue an order regarding continued placement of the child. The court shall order the local social services agency to determine whether to commence proceedings for termination of parental rights on grounds of abandonment as defined in Minnesota Statutes § 260C.301, subd. 2. The court may disregard the six-month and twelve-month requirements of Minnesota Statutes § 260C.301 in finding abandonment if the biological parent has failed to execute a consent within the time required under Rule 33.04 and has made no effort to obtain custody of the child.
Minn. R. Adop. P. 33.05