The commissioner shall not adopt a design or erect a sign to mark or memorialize a highway or bridge, pursuant to designation by the legislature, unless the commissioner is assured of the availability of funds from nonstate sources sufficient to pay all costs related to designing, erecting, and maintaining the signs. The commissioner may remove a sign that marks or memorializes a highway or bridge as designated by the legislature if:
Minn. Stat. § 161.139
1996 c 455 art 3 s 5; 2009 c 23s 1