Are there potential situations in which use of an EFB even as a supplement for situational awareness only would be considered a violation of a rule?
I understand that some operators do not have approval to use EFBs, and they are required to utilize paper charts. Does that normally preclude the use of an EFB for supplementation as long as all requirements are otherwise met by onboard paper products?
I suppose one could say this is unlikely to happen for the sole reason that it's hard to prove what is being used onboard in-flight, and my question is more to the point of whether or not the use is actually allowed as long as it's only a supplementation.