Derecognition of a trade union, while legal, may be referred to as union busting by trade unions. Derecognition must be accomplished according to statutory guidelines. Workers may derecognize a union which either no longer has support from its members, or if union membership falls below 50%. Employers may derecognize a union if they no longer employ 21 or more workers. If the Central Arbitration Committee (CAC) accepts an application, and the union in question has either lost support or the membership level falls below 50% of the workers, the CAC can declare that a derecognition ballot be held."