(a) A person may not establish, call, participate in, or aid picketing at or near the premises of an employer with whom a labor dispute does not exist.
(b) In this section:
(1) “Employee” includes any person working for another for hire in this state, but does not include an independent contractor.
(2) “Employer” means any person who engages the services of an employee.
(3) “Labor dispute” means a controversy concerning wages, hours, or conditions of employment between an employer and employees. A controversy is not a labor dispute if the employees do not have a real and substantial economic interest in the work performed for the employer.
(4) “Picket” includes a person:
(A) stationed by or acting in behalf of an organization to:
(i) induce anyone not to enter the premises being picketed;
(ii) apprise the public by signs or other means of the existence of a labor dispute at or near the premises being picketed; or
(iii) observe the premises being picketed to ascertain who enters or patronizes the premises; or
(B) who follows employees or patrons of the premises being picketed to or from those premises to observe them or to attempt to dissuade them from entering or patronizing the premises.