ATC has absolutely no idea what capability your aircraft has in regards to CAT I, II, or III. Even the latest and greatest aircraft will have issues…..op specs, crew pairings, aircraft downgrade, etc. There (to my knowledge) is nothing on the “strip” to indicate aircraft capability for low vis operations.
Adding to the confusion…..recently approached an airport (US) advertising CAT I weather on the ATIS. We were in a Cat III aircraft going to a Cat III runway (no notams otherwise). It was going to be a tight Cat I approach, so we requested/advised we would like to do a Cat III. Controller said “you can do whatever you want to do”. I thought they had to enforce hold lines, check monitors, etc. for Cat III ops.
Any ATC out there who would like to address?