Transitioning to BRNAV from the terminal airspace

[JonDyer]

Hi

As we know, all European en-route airspace above FL095 is B-RNAV and any aircraft flying within it must be equipped and certified.

For non P-RNAV certified aircraft "RNAV" SIDs and STARs must not be used and SIDs & STARs that are used must utilise conventional aids (Raw Data)

Can anyone point me to the source documentation that describes at which point in the departure process we change from Raw Data to B-RNAV?

Is it for example,
Above MSA?
After the final SID waypoint?
Above FL095?
Something else entirely?

I am not being lazy - I have checked out ECAC Nav, TGL10 and ICAO 9650 and I didn't find the specific answer there nor any reference to the authoritative source.

Where else should I be looking?

Thanks.