This leaf should be available only if we disable l3 access and the traffic type or types should be single vlan.
leaf VLAN-normalization
{
type enumeration
{
enum "Normalize to Dot1q tag";
enum "Normalize to QinQ tags";
enum "Normalize to VLAN none";
enum "Normalize not required";
}
when "../../enable-L3-access = 'false' and ../traffic-type = 'Transport single vlan' and ../traffic-types = 'Transport single vlan'";
}