The Central Zoo Authority wants to shed its responsibility of monitoring the upkeep of elephants in circuses, saying the task should be entrusted with the Animal Welfare Board in view of frequent instances of violation of norms by the owners. It has written to the environment ministry to keep the circuses out of its ambit, citing inability of circus owners to comply with the provisions of its Recognition of Zoo Rules 1992 in the upkeep of elephants. "With the best will in the world, circuses do not have the facilities to keep the animals in the kind of environment that could be considered anywhere acceptable,' CZA member secretary B R Sharma said.