Minn. Stat. § 609.4975
Whoever, having knowledge that an investigative or law enforcement officer has been authorized or has applied for authorization under chapter 626A to intercept a wire, oral, or electronic communication, and with intent to obstruct, impede, or prevent interception, gives notice or attempts to give notice of the possible interception to a person, may be sentenced to imprisonment for not more than five years or to payment of a fine of not more than $10,000, or both.
Whoever, having knowledge that an investigative or law enforcement officer has been authorized or has applied for authorization under chapter 626A to install and use a pen register or a trap and trace device, and with intent to obstruct, impede, or prevent the purposes for which the installation and use is being made, gives notice or attempts to give notice of the installation or use to any person, may be sentenced to imprisonment for not more than five years or to payment of a fine of not more than $10,000, or both.
Whoever, having knowledge that a peace officer has been issued or has applied for the issuance of a search warrant, and with intent to obstruct, impede, or prevent the search, gives notice or attempts to give notice of the search or search warrant to any person, may be sentenced to imprisonment for not more than five years or to payment of a fine of not more than $10,000, or both.
Minn. Stat. § 609.4975
1989 c 336 art 2 s 3; 1990 c 426 art 2 s 1