dUS
Reading your posts, we agree. No TAF = Alt reqd.
Regarding the RNAV bit, and a seperate argument now
Jepp RADIO AIDS page AU-8 refers
Unless using a 145a or 146a receiver with a valid FDE prediction, at both the dest and altn if reqd, provision for an altn may not be based on RNAV(GNSS) appr capability.
Agree, clear as mud.