If you're looking to find out if there are any "privileged" scan classes that are reserved for certain types of points on the PI to PI interface, then yes - Scan class 1 signs up for exception values from the source archive, all other scan classes make calls to the archive for their events. The PI to PI interface doesn't have advise tags per se, since advise tags are an OPC infrastructure concept. The PI to PI interface does have the ability to send snapshot data for the tags it's collecting from the source PI Server which you can configure through Location 3, please see the documentation here: PI to PI Interface
I was confirming if the advice tag concept is present for PI to PI interface. It is clear now.