FYI, I anticipated all of you being of no use to actually answer my question, so I also followed up with the listed contact at Wesley this morning. I received a reply that the lottery will be held at 10 a.m. on March 5 (this is the Primary Zone lottery) at the school and one can ask for the specific location in the office that morning.
Not quite the overt notification of when and where as promised in the charter, but it does appear to be public (if you ask).