The wording of the regulation seems to suggest that you demonstrate CPL knowledge. The definition of this in the front of Part-FCL states that it is done by passing the EASA CPL exams. I would expect that having passed them once you've demonstrated your level of knowledge and there is (
AFAIK) no requirement to keep doing so every three years!
DD is correct. You only need to demonstrate the ability once by passing the examinations. This would also apply if you had passed the exams, say, 10 years ago. Expired for the purpose of obtaining a CPL, but you have demonstrated CPL knowledge for an FI/PPL certificate.