In large organizations the administration of access privileges (such as the assignment of an access right to a user in a particular role) is handled cooperatively through distributed administrators in various different capacities. A quorum may be necessary, or a veto may be possible for such a decision. In this paper we present two major contributions: We develop a Role-Based Access Control (RBAC) approach for specifying distributed administration requirements, and procedures between administrators, or administration teams, extending earlier work on distributed (modular) authorization. While a comprehensive specification in such a language is conceivable it would be quite tedious to evaluate, or analyze, their operational aspects and properties in practice. For this reason we create a new class of extended Petri Nets called Administration Nets such that any RBAC specification of (cooperative) administration requirements (given in terms of predicate logic formulas) can be embedded i...