References updated due to TP document

[4]    ETSI TS 129 229:   "Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Cx and Dx interfaces based on the Diameter protocol; Protocol details (3GPP TS 29.229 Release 16.3)".

[5]    ETSI TS 129 214:   "Universal Mobile Telecommunications System (UMTS); LTE; Policy and charging control over Rx reference point (3GPP TS 29.214 Release 16.8)".

[6]    ETSI TS 129 514:   "5G; 5G System; Policy Authorization Service; Stage 3 (3GPP TS 29.514 Release 16.21)".

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[6]    ETSI TS 132 260:   "Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management;Charging management;IP Multimedia Subsystem (IMS) charging (3GPP TS 32.260 Release 15)".

[7]    ETSI TS 132 299:   "Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; Diameter charging applications (3GPP TS 32.299 Release 15)".

[9]    ETSI TS 129 212:   "Universal Mobile Telecommunications System (UMTS); LTE; Policy and Charging Control (PCC); Reference points (3GPP TS 29.212 Release 15)".

[10]   ETSI TS 129 272:   "Universal Mobile Telecommunications System (UMTS); LTE; Evolved Packet System (EPS); Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) related interfaces based on Diameter protocol (3GPP TS 29.272 Release 15)".

[11]   ETSI TS 129 215:   "Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Policy and Charging Control (PCC) over S9 reference point; Stage 3 (3GPP TS 29.215 Release 15)".

[12]   ETSI TS 129 328:   "Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia (IM) Subsystem Sh interface; Signalling flows and message contents (3GPP TS 29.328 Release 15)".

[13]   ETSI TS 129 329:   "Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Sh interface based on the Diameter protocol; Protocol details (3GPP TS 29.329 Release 15)".

[14]   ISO/IEC 9646-1:    "Information technology -- Open Systems Interconnection -- Conformance testing methodology and framework -- Part 1: General concepts".

[15]   ISO/IEC 9646-7:    "Information technology -- Open Systems Interconnection -- Conformance testing methodology and framework -- Part 7: Implementation Conformance Statements".

[16]   ETSI ETS 300 406:  "Methods for testing and Specification (MTS); Protocol and profile conformance testing specifications; Standardization methodology".

[17]   IETF RFC 3588:     "Diameter Base Protocol".

[18]    ETSI ES 203 119-4: "TDL: Structured Test Objective Specification (Extension)"

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[7]	   ETSI TS 124 501:   "5G; Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3 (3GPP TS 24.501 version 16.14.0 Release 16)".

[8]	   ETSI ES 203 119-4: "Methods for Testing and Specification (MTS); The Test Description Language (TDL); Part 4: Structured Test Objective Specification (Extension)".

[9]	   IETF RFC 3261: "SIP: Session Initiation Protocol".

[10]   ETSI TS 123 167: "IP Multimedia Subsystem (IMS) emergency sessions".

[11]   IETF RFC 5031: "A Uniform Resource Name (URN) for Emergency and Other Well-Known Services".

[12]   ETSI TS 123 228: "Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS); Stage 2 (3GPP TS 23.228 version 16.7.0 Release 16)".