A variance is a special performance

A variance is a special performance standard, not a general standard. As such, it is limited to cover certain specific products and is only applicable to such products produced by the variance holder. Thus, a variance is not transferrable from one manufacturer to another. Also the holder of the variance may not introduce equipment that was not specifically covered by the variance. For example, a laser projector manufacturer (A), who has a variance covering his projector and his light shows incorporating that projector and certain auxiliary equipment, cannot transfer the coverage of his variance to light show manufacturer (B), who purchases the projector and incorporates it with equipment he (B) already has, to make a light show. In such a case manufacturer (B) would be required to obtain his own variance for laser light shows. Also, manufacturer (A) could not incorporate other equipment unless this equipment is included in his variance