Does time served as a GS staff or National Staff count towards the five year period required for eligibility for mobility allowance?

Mobility allowance is payable to staff in the P and FS categories. To qualify for payment of the mobility allowance, a staff member must have five years’ prior consecutive service as a staff member in the United Nations or another organization of the common system. Service credited towards the five-year requirement may include service as a GS or NO staff member.