I am recently retired and from memory, in Australia, a nav tolerance of 3 times the approach standard was applied then the 1 NM separation requirement applied.
As the worst RNP-AR approach standard applied here is 0.3NM, the nav tolerance of the other aircraft has to be 1.9NM away from the RNP approach path.
We had RNP departure and approach paths designed so that they missed a parachuting area and a VFR corridor - worked great.
Last edited by topdrop; 21st May 2012 at 23:18.