++++ 1 . OFFICIALS - TEMPORARY POSTING - EXPRESS AGREEMENT OF THE APPOINTING AUTHORITY - NECESSITY ( STAFF REGULATIONS OF OFFICIALS, ARTICLE 7 ( 2 )) 2 . OFFICIALS - TEMPORARY POSTING - OFFICIAL CALLED UPON TO OCCUPY A POST TEMPORARILY - DISCRETIONARY POWER OF THE APPOINTING AUTHORITY ( STAFF REGULATIONS OF OFFICIALS, ARTICLE 7 ( 2 ))