(a) Whoever willfully violates either §860.3 or §860.4 shall, upon conviction, be guilty of an infraction punishable by a fine of not more than $5,000.

(b) Whoever willfully violates either §860.3 or §860.4 with respect to any facility, installation or real property enclosed by a fence, wall, floor, roof, or other structural barrier shall upon conviction, be guilty of a Class A misdemeanor punishable by a fine not to exceed $100,000 or imprisonment for not more than one year, or both.