20. Where an officer is demoted, his salary shall either be decreased, if needed, to reach the maximum for the salary class for his new position, or maintained, if his salary is already within the range of this salary class.When the salary of an officer is thus decreased following such a demotion:
— the officer shall receive as a lump sum the total difference between the salary he received prior to the demotion and the new annual salary he is entitled to, for the first 3 years following the demotion;
— the officer shall receive in the same manner two thirds of the difference between the salary he received prior to the demotion and the new annual salary he is entitled to for the fourth year, during that fourth year;
— the officer shall receive in the same manner one third of the difference between the salary he received prior to the demotion and the new annual salary he is entitled to for the fifth year, during that fifth year.
The salary rules provided for in the first and second paragraphs shall also apply in cases of career reorientation, with the necessary modifications.