If you were to have a cloud sitting right over the beginning of your landing runway, visibility is RVR values all 1500m or more, but you have a vertical visibility at the THR of your RWY of 200ft, what would this mean to you?
Nothing meaningful, I'm afraid.
If LVP CAT II are active, then it would be CAT II. If not, ceiling and VV are not considered limiting for commencing CAT I approach and we'd do cat I.