@Edent Eww, I thought RFC6238 (+ refs) nailed everything down.. sweet summer child that I am 😂 It looks like someone has lodged an errata against the provisioning statement in $4.2 though: https://www.rfc-editor.org/errata/rfc6238Given there /should/ be a more complete statement of provisioning, perhaps another RFC that ties up the loose ends.. ever written one? RFC Errata Report » RFC Editor