Indiana Code Title 22. Labor and Safety § 22-6-1-12

(a) A case shall be held to involve or grow out of a labor dispute when the case involves persons who are engaged in the same industry, trade, craft, or occupation, or have direct or indirect interests in the same industry, trade, craft, or occupation, or who are employees of the same employer, or who are members of the same or an affiliated organization of employers or employees, whether such dispute is:

or when the case involves any conflicting or competing interests in a labor dispute (as defined in subsection (c)) of persons participating or interested in the labor dispute (as defined in subsection (b)).

(b) A person or association shall be held to be a “person participating or interested in a labor dispute” if relief is sought against the person or association, and if the person or association is engaged in the same industry, trade, craft, or occupation in which the dispute occurs, or has direct or indirect interest in the same industry, trade, craft, or occupation in which the dispute occurs, or is a member, officer, or agent of any association composed in whole or in part of employers or employees engaged in such industry, trade, craft, or occupation.

(c) The term “labor dispute” includes any controversy concerning terms or conditions of employment or concerning the association or representation of persons in negotiating, fixing, maintaining, changing, or seeking to arrange terms or conditions of employment, regardless of whether or not the disputants stand in the proximate relation of employer and employee.

(d) The term “court of the state of Indiana” means any court of the state of Indiana whose jurisdiction is conferred or defined or limited by statute.