Mille Lacs has it’s own bass rules.
Largemouth and Smallmouth Bass: Bass season is open May 14 – February 26. Prior to May 28, all largemouth bass and smallmouth bass must be immediately released. Beginning May 28, combined possession limit is four, with only one bass over 21″. All bass 17″-21″ must be immediately released.
Keeping bass is allowed until Feb. 26 and Tournaments can be exempted from the slot rules.