I'm still trying to find where ICUS / P1US etc is talked about in ICAO Annex 1 for purposes other than a higher grade of licence issue.
Comp Stall,
You are reading with an Australian mindset, not international English, the para. you refer to makes it clear that ICUS "counts", but does NOT say that logging ICUS is limited to the hours needed for upgrading licenses.
Tootle pip!!