VOR, NDB and ILS are 'conventional' approaches. There is no associated RNP value. The RNP values only apply to RNP APCH (charted as RNAV(GNSS)), where the final approach segment is always 0.3 and all the other segments are 1.0, and RNP AR APCH (charted as RNAV(RNP)) where any leg can be as low as 0.1.