You can't put a 'lim' or an 'x' on an EIC, only a tick or an 'n/a'. Any failures that would warrant an 'x' should be rectified before the cert is issued. So, in this case your choices are:
1. 'n/a' because diagrams/schedules etc. do not exist and therefore cannot be present by definition ;-)
2. a tick because you are providing a schedule of inspections and tests with your cert.
3. a tick and you spend an eternity drawing up plans and diagrams.
I'd suggest option 2 and ensure you also have the RCD test and next periodic due instruction labels on the CU!