The director and the persons employed for the administration and enforcement of this chapter may, with the concurrence of the commissioner of public safety, exercise the powers of peace officers when those powers are specifically granted by the board. Powers granted by the board under this section may be exercised only when necessary for the enforcement of the criminally punishable provisions of this chapter, other criminal statutes relating to substances or activities regulated or permitted under this chapter, regulations of the board, and other criminally punishable laws and regulations relating to marijuana.