Access control allows an authority to selectively control access to a building, room, parking gate, etc. A “keycard” is issued with selective clearance, meaning it is programmed to only allow access to certain rooms, or at certain times, depending on the employee. The level of access can be increased, decreased, or deleted completely should that be necessary (as in the case of an employee termination). This versatile application is secured via a magnetic lock with 1200 pounds of resistance, ensuring ultimate security.