MUs can access EWC by sending association request and providing proper credentials. However, EWC allows creation of a master list of a blacklist or a whitelist group to control such access. There can exist only a blacklist or a whitelist (mutually exclusive) at any time. The list of MUs belonging to such a list is populated in muACLTable. The muACLTable content can be interpreted in conjunction with this field as follows: - blacklist(1): MUs listed in muACLTable cannot access EWC resources. - whitelist(2): Only MUs listed in muACLTable can access EWC resources.