You can always share the Decree of the Overseer in the public, it is a public notice by nature. You can share the agreements you use. But since the Articles of Establishment is a private document, it can only be shared with members of your society.
To provide documentation for the public facing Private Association, the Certification of Unincorporated Association is the document to use. However, there are times when that is not enough, especially when setting up bank accounts. In these cases, you can use the PA Articles of Establishment, normally private documents, out of the Rule of Necessity.