This appears to be an editing inconsistency since ENR3.3 (RNAV Routes) of the Italian AIP is yet to be developed. Section 2.1 of GEN1.5 only refers to RNAV equipment (specifying guidance accuracy of 5nm, therefore RNAV5), suggesting that the RNP5 statement in ENR3.1 is yet to be updated to RNAV5. Perhaps worth raising as a consistency issue, and well worth discussing during PBN training.