  Role-Based Access Control (RBAC) is a popular authorization model used to
manage data-access constraints in a wide range of systems. RBAC usually defines
the static view on the access rights. However, to ensure dependability of a
system, it is often necessary to model and verify state-dependent access
rights. Such a modelling allows us to explicitly define the dependencies
between the system states and permissions to access and modify certain data. In
this paper, we present a work-in-progress on combining graphical and formal
modelling to specify and verify dynamic access control. The approach is
illustrated by a case study -- a reporting management system.
