Minn. Stat. § 144.111: RULES, NOTICE PUBLISHED.

Three weeks' published notice of such rules, if of general application throughout the state, shall be given at the seat of government; if of local application only, as near such locality as practicable. Special rules applicable to particular cases shall be sufficiently noticed when posted in a conspicuous place upon or near the premises affected. Fines collected for violations of rules adopted by the commissioner shall be paid into the state treasury; and of local boards and officers, into the county treasury.