When an account owner publishes an item to a node, a PEP service MUST generate a notification and send it to all appropriate subscribers (where the number of notifications is determined by the foregoing rules).
When a PEP service receives initial presence information from a subscriber's resource with a non-negative priority and including XEP-0115 information that indicates an interest in the data format, it MUST generate a notification containing the last published item for that node and send it to the newly-available resource.
As an exception to the foregoing MUST rules, a PEP service MUST NOT send notifications to a subscriber if the user has blocked the subscriber from receiving all or any kinds of stanza (presence, message, IQ, or any combination thereof) using communiations blocking as specified in XMPP IM.
As an exception to the foregoing MUST rules, a PEP service MUST NOT send notifications to a subscriber if the user has blocked the subscriber from receiving all or any kinds of stanza (presence, message, IQ, or any combination thereof) using communications blocking as specified in &xep0016; or &xep0191;.