"Implementation" is not defined, in the conformance clause. Don't know what is supposed to conform.

What is an "Implementation" is not defined in the conformance clause or before. Is it a PDP implementation? PEP? Policy?
An application (6.1)?
A lot of requirements seem to apply to Policies - but the conformance clause seems to ignore the conformance of Policies artifacts themselves, as it seems to concern only entities that "performs evaluations" ? This would mean that there are many normative requirements for Policy artifacts unused for conformance. Need to have a separate conformance clause for each possible type of Implementation.