- There need to be exactly three ASSIs (T 14.10.1)
- At least one ASSI must be visible from any angle (T 14.10.3)
- Each ASSI must be visible in bright sunlight (T 11.10.1)
The definition of the AS statuses does not require any information on the previous status the AS has shown. Therefore, the implementation for determining the AS status can be done by transforming the flowchart given in the rules into a simple set of nested if-else statements that is called with its required inputs during every software execution cycle. The computed result will then be passed to the ASSI, see chapter 6 and the Data Logger, see chapter 15.