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An introduction of a new feature as part of a release is documented in the form of a Change Request. The affected technical specifications due to a new feature are captured under a particular Change Request. Given a Change Request number, the affected technical specifications may be downloaded from the 3GPP portal https://portal.3gpp.org/ChangeRequests.aspx. One can find the relevant changes introduced in each affected technical specification due to a new 3GPP feature.