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What is the effect on the amount of the assignment grant payable to a staff member if their initial one-year appointment in a duty station (and travel to that location was paid for by the Organization) is extended beyond one year?

For internationally recruited staff members holding an appointment other than a temporary appointment : “If an assignment of less than three years’ duration is subsequently extended to three years or more, a second one-month lump-sum is payable at the beginning of the third year”.