ASIAL`s new redundant level certification system helps to ensure that, despite a serious incident or disaster in a redundant alarm monitoring centre, the critical business functions of an alert monitoring centre remain in operation in a relatively short period of time or are brought back to an operational state. 26. Customer`s Responsibilities26.1 Customer shall immediately notify the ISS in writing in the event of a change in its contact details or alarm response requirements26.2 Customer shall maintain the alarm in good condition at its own expense and in accordance with the manufacturer`s requirements (including, but not limited to, timely recharging or replacement of batteries). 24. Access24.1 Customer shall ensure that the ISS has clear and undone access to the designated surveillance area at all times so that the ISS can perform the prescribed surveillance services. The Customer undertakes to ensure that the premises constitute at all times a safe working environment and must not contain (without restriction) asbestos or other similar risks of infection or construction disease.24.2 In the event of a change in circumstances or planned modifications of the premises that may affect ISS`s ability to provide services safely, the customer: information.25. . . . . . .