Leon
Sorry, sporadic access to technology at the moment.
What Chug says is correct. The vast majority of what I post about refers to (a) attaining airworthiness and (b) maintaining it. That two sided coin is a mandatory pre-requisite to you having an aircraft that you can then make your fitness for purpose (operational) decision about. Having maintained said aircraft, I'm not unfamiliar with the decisions you have to make.
That is why Lord Philip reminded MoD in his report that (in old speak) the CA Release is mandated upon ACAS. The evidence, supplied inadvertently by MoD, revealed that mandated process had been serially ignored and false declarations made that it had been adhered to. In other words, an avoidable accident could have been avoided by implementing perfectly good, simple regulations, long before you ever saw the aircraft. The MAA is now engaged in re-inventing that good wheel, while completely ignoring the underlying culture that permitted, in fact encouraged, the false declarations.