[JesseK]

I think this is more of a question as to whether the previous years' Q&A interpretations are usable as evidence for legality to this year's rules. Can a team use (or conversely claim ignorance to) previous years' interpretations if the rule from that year is still worded the same way and was never addressed in the current year's Q&A? If not, then neither can inspectors, correct?

In this particular instance with the compressor, the rules as written are somewhat obvious without the Q&A IMO.