UAC(Unified Access Control)- with 5G USIM

For SIB1 message there is UAC parameter is there , whether its required to configure this parameter , what is the function of the parameter

Whether UAC parameter will be used to relate in 5g USIM

whether UAC in SIB1 is required for the network to work or can i discard UAC setting, what will happen

The access class barring schemes are configured through the UAC barring RRC IEs:

When UAC barring IEs are changed, the UE updates the stored UAC IEs according to the selected PLMN and its access class. When the UE attempts access, the internal algorithm ofthe UE uses the UAC IEs to determine whether the UE is access-barred and for how long.