22.1683GPPEarthquake and Tsunami Warning System (ETWS) requirementsStage 1TS
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or non‑specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
 3GPP TR 21.905: "Vocabulary for 3GPP Specifications"
 3GPP TR 22.968: "Study for requirements for a Public Warning System (PWS)"