For the purposes of this Act, if a computer network is operated by, or on behalf of, a Commonwealth agency, security authority or eligible authority of a State, the network is appropriately used by an employee, office holder or contractor of the agency or authority if:
(a) the employee, office holder or contractor has undertaken, in writing, to use the network in accordance with any conditions specified, in writing, by the agency or authority; and
(b) those conditions are reasonable; and
(c) the employee, office holder or contractor complies with those conditions when using the network.