The access permissions granted for this document. Valid values are 1 - No changes to the document are permitted any change to the document invalidates the signature. 2 - Permitted changes are filling in forms instantiating page templates and signing other changes invalidate the signature. 3 - Permitted changes are the same as for 2 as well as Annotation creation deletion and modification other changes invalidate the signature....same as for 2, as well as annotation creation, deletion, and modification;...same as for 2, as well as annotation creation, deletion, and modification;...