Section: 4.3.12.6 PCC for Emergency Services
Content: Dynamic PCC is used for UEs establishing emergency service, the procedures are as described in TS 23.203[ Policy and charging control architecture ]  [6]. When establishing emergency bearer services with a PDN GW, according to clause 4.7.5, the PCRF provides the PDN GW with the QoS parameters, including an ARP value reserved for the emergency bearers to prioritize the bearers when performing admission control. Dynamic PCC shall be used to manage IMS emergency sessions when an operator allows IMS emergency sessions. NOTE: For IMS emergency services prior to this Release of this specification, dynamic PCC support was not required in the specifications. According to clause 4.7.5, when solely using voice/GTT, local configuration of static policy functions is also allowed prior to this Release of this specification and is not subject to standardization. The PCRF ensures that the emergency PDN connection is used only for IMS emergency sessions. The PCRF rejects an IMS session established via the emergency PDN connection if the AF (i.e. P-CSCF) does not provide an emergency indication to the PCRF.