A trade union is an association of workers formed to protect and improve the socio-economic status of its members through collective action. Key features include being a democratic institution ultimately controlled by members. A registered trade union receives legal status and protections for acts done in contemplation of a trade dispute. There are also restrictions on how union funds can be spent and requirements for financial disclosures, office bearer qualifications, and membership rights. While registration is not required, it provides benefits like immunity and stronger recognition for collective bargaining.