[etni] Oral Testing in another school

Our school intends to dock the salaries of the teachers on the day we go to
do oral testing at another school.  They claim that we should be doing the
oral testing on our free day.
Is docking the salary of teachers testing at another school accepted
practice?
Do other teachers test on their day off?
Does anyone have an officilal answer about this?  Or unofficial one?
Thanks,
Michele

Other related posts: