Minn. Stat. § 626.15: EXECUTION AND RETURN OF WARRANT; TIME.

(a) Except as provided in paragraphs (b) and (c), a search warrant must be executed and returned to the court which issued it within ten days after its date. After the expiration of this time, the warrant is void unless previously executed.

(b) A search warrant on a financial institution for financial records is valid for 30 days.

(c) A district court judge may grant an extension of a warrant on a financial institution for financial records upon an application under oath stating that the financial institution has not produced the requested financial records within the 30-day period and that an extension is necessary to achieve the purposes for which the search warrant was granted. Each extension may not exceed 30 days.

(d) For the purposes of this section, "financial institution" has the meaning given in section 13A.01, subdivision 2, and "financial records" has the meaning given in section 13A.01, subdivision 3.