Fireflybob,
We could allow this to descend into symantics, but I think it would be best to allow this particular thread drift to disappear. I appreciate what you're saying, but in response - I have seen CAT I conditions where there is near perfect visibility below a solid, thick cloud layer at 100', with a cloud base below 100'. Likewise, I've seen CAT II conditions with the required RVR minima but vv///. Every approach is different. LVP conditions, by their very nature, are extremely dynamic.
But there again, my 10 years as a Tower and Approach controller probably precludes me from having any clue about what I'm talking about.
Enough of the drift, I've tried to help what I considered to be poorly informed posts, but there are obviously those who aren't interested in listening.
HundredPercentPlease: No such legislation exists in Ireland.
And before anyone suggests it: No this is not a toys out of the pram moment. Rant over.