I'd suggest it would be wise to seek clarification from UMCA re: alcohol, noting that whilst the Year Record Rules are an addendum to general rules, but in being an addendum, seem to specifically state points 16 and 17 as applying, so it could be argued that where other general rules aren't specifically stated in this manner, they can't apply. This is ambiguous and open to interpretation, however, so I feel UMCA clarification is necessary....
I'm also strongly of view that strictly applied rules usually take away common sense/reasonableness, so should only be applied based on a sensible, reasonable interpretation....I would hope UMCA hold a similar view.