Minn. Stat. § 16B.2421: BIRD-SAFE BUILDINGS.

Between March 15 and May 31 and between August 15 and October 31 each year, occupants of state-owned or state-leased buildings must attempt to reduce dangers posed to migrating birds by turning off building lights between midnight and dawn, to the extent turning off lights is consistent with the normal use of the buildings. The commissioner of administration may adopt policies to implement this requirement.