PCC rule includes Packet-Filter.
When we say PCC rule then it Packet-Filter is just a part of it. How Traffic shaping will happen depends on a lot of parameters.
Like QCI, ARP, and the QoS-Parameters MBR,GBR. Precedence plays a vital role in the packet filter treatment.
Eg : I have 5 filters in a particular session. Based on the precedence PGW will check if the packet matches the filter and then pass it towards SGW.
Also, there can be a possibility that you may have over-lapping filters. Now to which bearer the packet will go will be decided based on the precedence.
Check 29.212 for more information.