(Open Access) refers to an event that has no specific conditions of entry, barring minimum age and/or maximum number limits for certain courses.
(Restricted Access) refers to a closed event – private groups, military/law-enforcement units, corporate entities, etc. There may be a very limited opportunity to accommodate additional persons who meet certain criteria, but this will be entirely at the discretion of the host – email your interest, but note that no details will be divulged unless the host permits…including their identity. Alternatively, it might be possible to capitalise upon the circumstances and book a separate event, or tuition, in the general location indicated. This is the reason such events are listed at all. Be aware that at all times, existing confidentiality, integrity, and discretion will take priority over any request.
“Don’t show up to prove. Show up to improve.” Simon Sinek