If you are talking Australian registered aircraft in Australia - (a) and (b) can legally be correct depending on model and operational category.
The big SID's hurt every 10 or 20 years - So can be SID's Compliant now but due many SID's in 6 months from now.
Same as a SID'S compliant can be they have never been due yet, but will be in a year or so - currently it is compliant all "due" inspections.