4.2A.2 List of PLMNs with associated access technology restrictions

The UE shall replace the previously stored entry associated with the current PLMN, if any, with the newly received access technology utilization control information together with the PLMN identity of the current PLMN in the list of "PLMNs with associated access technology restrictions" (see 3GPP TS 23.122 [5]). Additionally:

• if the type of access technology utilization control indicates "current PLMN and its equivalent PLMN(s)", the UE shall delete all previously stored entries associated with PLMNs included in the list of equivalent PLMNs, excluding the entry associated with the current PLMN; and
• if the type of access technology utilization control indicates "current PLMN", the UE shall delete all previously stored entries associated with PLMNs included in the list of equivalent PLMNs and indicating "current PLMN and its equivalent PLMN(s)".

NOTE 1: If the received access technology utilization control information indicates "current PLMN and its equivalent PLMN(s)" only one entry is added to the list of "PLMNs with associated access technology restrictions" together with the PLMN identity of the current PLMN.

The UE shall delete all entries in the list of "PLMNs with associated access technology restrictions" in which:

• only GSM, only UTRAN, or only GSM and UTRAN access technologies are marked as not restricted; or
• all access technologies supported by UE are marked as restricted;

when the UE is switched off or when the UICC containing the USIM is removed, and periodically (with a period in the range 12 to 24 hours).

NOTE 2: The deletion of the entries in which only GSM, only UTRAN, or only GSM and UTRAN access technologies are marked as not restricted or all the access technologies supported by UE are marked as restricted is done as in these cases the network has no mean to provide the access technology utilization control information to the UE via NAS signalling.

The same list is used by 5GMM, EMM, GMM and MM, regardless whether the UE is operating in single-registration mode or dual-registration mode. When the UE is switched off, it shall keep the stored list so that it can be used after switch on. The UE shall delete the stored list if the USIM is removed. The number of entries that the ME can store in the list of "PLMNs with associated access technology restrictions" is implementation specific, but it shall be at least one. When the list is full and a new entry has to be inserted, the oldest entry shall be deleted.