Sec. 3. A person who fails to obey the order of a law enforcement officer to desist from conduct in violation of section 2 of this chapter commits a Class B misdemeanor if the law enforcement officer:
(1) observed the person engaged in conduct that violates section 2 of this chapter; or
(2) has reasonable grounds to believe that the person:
(A) has engaged in the conduct that day; or
(B) plans or intends to engage in the conduct that day on specific premises.