[Ross Nicol]

Here is the CAMS requirement for us here in Australia.-

All vehicles of the 2nd and 3rd category (sports cars) shall be equipped with a battery isolation (master) switch, which effectively isolates all electrical circuits from the battery and stops the engine. It must be capable of being operated by the seated driver. There must also be a 2nd switch or a remote means of operating the main switch which can be operated from outside the vehicle. This shall be positioned in the vicinity of the base of the A pillar on the drivers side. This external switch or remote activation must be clearly marked by a symbol showing a red spark in a white edged blue triangle.
Ross