It may be helpful to clarify that the Mandate being discussed is the so-called PBN-IR and it currently applies only to ILS CAT I operations, which are supposed to only be available for contingency operations after the cutoff date in the EU; PBN approach operations (LPV, LNAV/VNAV or LNAV) being offered by default. The mandate explicitly excludes ILS CAT II/III or GBAS operations and the related installations A number of questions need discussion, not only the target timeline as regards airborne capability, but also how the EU definition of contingency is related to ICAO provisions and all the aspects of GNSS interference risk.
