7.0 SPARE CAPACITY The console structure, as indicated in section 4, shall provide capacity for future expansion and change by the design of the interchangable primary and secondary control panels, intercom panel, and cooling vents. The subrack allows space for further board additions, the PSU chosen in the detailed design shall provide a minimum of 100 % spare power capacity. 8.0 MONTREAL PROTOCOL AND HEALTH AND SAFETY As stated in reference 1. All products used in the production and manufacture of the device shall comply with the provisions of the Montreal protocol. There shall be no access to any hazardous voltages by personnel operating or using the device. Where these are present, internal to the console, they will be clearly labeled with the internationally recognised symbol.