Abstract: Methods, systems, and computer readable media for using user defined session description protocol (SDP) rules are disclosed. According to one method, the method occurs at a policy and charging rules function (PCRF). The method includes receiving at least one user defined SDP rule, wherein the user defined SDP rule includes at least one SDP parameter reference for referencing at least one SDP parameter. The method also includes receiving SDP information in an SDP related message associated with setting up a session. The method further includes determining, using the at least one user defined SDP rule and the SDP information, a policy related rule associated with the session.