The document discusses unfair labor practices under Philippine law. It defines unfair labor practices as violations of workers' rights to organize and collectively bargain that disrupt labor relations. The document outlines unfair labor practices by employers, such as interfering with union activities, discrimination based on union membership, and violating collective bargaining agreements. It also discusses unfair labor practices by unions, remedies and enforcement procedures under the labor code. Finally, it examines various types of union security clauses used in collective bargaining agreements to strengthen unions.