Verbal, written card or document, or posted sign (30.06)
If you have been given a Document that you had to sign to get your badge that stated no guns then this alone is enough.
This would be written notice. And has the same power and effect as a 30.06 sign and you can loose you CHL if caught.
If the property owner or one of there reps, walk up to you and tells you no guns allowed that is all they need to do as well and also has the same power and effect as a 30.06 sign.
The 30.06 sign is only required if they want to exclude CHL's and don't want to have to hand out Cards/Documents at the entrance stating no guns allowed or stand at the entrance and tell everybody that enters no guns allowed or have not had each person/worker/contractor issued a document, signed (as you say you have been for your badge) stating no guns allowed.
HTH.
