++++ 1. Officials ° Assignment ° Re-assignment under a staff rotation system ° Distinguished from the filling of a vacant post (Staff Regulations, Arts 4, 29 and 45) 2. Officials ° Distinction between "post" and "job" ° Consequences 3. Officials ° Members of the temporary staff ° Engagement ° Occupation of a permanent or temporary post (Conditions of Employment of Other Servants, Arts 2(a), 2(b) and 9)