Article 7 F1

The Appointing Authority shall, acting solely in the interest of the service and without regard to nationality, assign each official by appointment or transfer to a post in his function group which corresponds to his grade.

An official may apply for a transfer within his institution.

An official may be called upon to occupy temporarily a post in a grade in his function group which is higher than his substantive grade. From the beginning of the fourth month of such temporary posting, he shall receive a differential allowance equal to the difference between the remuneration carried by his substantive grade and step, and the remuneration he would receive in respect of the step at which he would be classified if he were appointed to the grade of his temporary posting.

The duration of a temporary posting shall not exceed one year, except where, directly or indirectly, the posting is to replace an official who is seconded to another post in the interests of the service, called up for military service or absent on protracted sick leave.