JAR-FCL 1.375
The privileges of the holder of a CRI(SPA) rating are to instruct licence holders for the issue of a type or class rating for single pilot aeroplanes.
JAR-FCL 1.005 (a) (2)
Whenever licences, ratings, authorisations, approvals or certrificates are mentioned in JAR-FCL, these are meant to be licences, ratings authorisations, approvals and certificates issued in accordance with JAR-FCL. In all other cases these documents are specified as eg ICAO or national licences.
Then where does it specify that a CRI may teach for a NPPL?