Trade union recognition 3: derecognition and changes - In the first part in our series of three Guidance Notes on the statutory trade union recognition scheme, we examined in detail the basic procedure by which an independent trade union (or independent unions jointly) may initially obtain statutory recognition from employers in respect of a group of workers, or "bargaining unit" (see IRLB 644 pp.2-14). The second part dealt with the protection of individual workers from victimisation in the context of that procedure (see IRLB 646 pp.9-12). In this issue, the final part in our series of Guidance Notes focuses, in particular, on the statutory provision fox the modification or abandonment of the bargaining unit to which a declaration of statutory recognition relates, in the light of subsequent changes in the nature, sructure, organisation and-or size of the employer's business. Our feature also analyses the grounds on which employers and-or workers may seek the derecognition of a statutorily recognised union or unions. In most cases, this may be done only after a period of three years has elapsed from the original declaration of statutory recognition.