includes measures such as the construction of monitoring rooms – higher security monitoring centres have solid concrete and steel construction with mantraps for access that can only be operated internally. Operational performance is graded 1, 2 or 3 (with one being the highest grading). It includes the ability of the monitoring centre to respond to events – generated by customers' security systems, operational reliability, data retrieval, etc. Accordingly, the highest grading is A1 and the lowest is C3 however even to be graded at C3 central stations still meet very high standards. There is presently no legislative imperative for an Australian central station to be 'graded' however police may refuse to respond to alarms despatched by non-graded companies and insurers may also deny a claim where an insured customer's system was monitored by an ungraded provider. The Australian Security Industry Association Limited (ASIAL) runs a grading scheme and publishes a list of graded monitoring centres. United Kingdom In the UK a similar structure of auditing takes place, with the National Approval Council for Security Systems provision of inspection and certification. Numerous standards such as BS5979 must be adhered to in order for a central station to be allowed to pass alerts to the police force. Emerging European standards are superseding these at this time. See also Burglar alarm Fire alarm Panic button alarm Personal Emergency Response System (PERS) Notes Security