No officer, agent, or employee of any labor union may enter, without the consent of the owner or operator, in or upon any ranch, farm, feed yard, shearing plant, or other agricultural premise, for the purpose of collecting dues, fines or assessments, or to solicit membership in any union, order or promote any strike, or in any other way interfere with the activities of any person employed on such premises. Violation of this section is a Class 2 misdemeanor.
SDCL 60-9-7