FlightPathOPN:
They are not new ones, but limited use of existing, with altitude and IAS because only distance is important as it is not timed reliant, FAAO 7130.3A.
I can only speak for the application of FAAO 7130.3A in airspace under FAA jurisdiction:
1. All RNAV course reversal and missed approach holding patterns use legs predicated on distance rather than time.
2. Pattern selection is made based on Table 2 (Holding Pattern Selection Chart) maximum holding altitude and speed from the 15-29.9 fix-to nav aid distance column based on AFS-420 memo for RNAV holding.
3. The speed selection for jet aircraft is 200 KIAS through 6,000, 230 KIAS through 14,000, and 265 KIAS above 14,000. 310 KIAS patterns are used for climb-in-hold.
4.Construction is in accordance with Figure 10 on Page 2-15 and Table 3 (Page 2-16) with a 2 n.m. secondary added for TERPs. (This construction can be done manually for those without the automation tools.)
5. End area reductions and on-entry reductions of the Figure 10 construction, which are permitted for qualified ATC holds, are not permitted for IAP holds.
6. RNAV leg length to be charted is selected from Table 8 on Page 6-3.
This is the method for all RNAV including RNP AR, except (as I stated previously) course reversal holding patterns are not used in RNP AR construction but often used in other RNAV IAPs. Other than this limitation on course-reveral holding patterns in RNP AR all other holding patterns are identical for RNP AR or any other RNAV IAP.
All FAA holding patterns are documented on FAA TERPs Form 8260-2.