Invitation advisory, or a homophonic hint to the starred answers' starts

• Invitation notation
• Like many restaurants without a liquor lic.
• Invitation stipulation
• "We're not serving liquor," on invites
• Party invite initials, sometimes
• Letters of invitation?
• Abbr. often preceding 29-Down
• Invite abbr
• Party letters

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
initialism (acronym) for "bring your own bottle" or "bring your own booze," by 1951.