I am a student and have a job too. To whom shall I give a military authorization in order to obtain reserve service benefit?

If you are working for a monthly or daily wage, and have worked at least 75 days over the three months preceding the service, you have to give the military authorization to your employer to let him pay the benefit to you.  If you have worked less than 75 days, you must claim the benefit from the National Insurance Institute and attach the military authorization and wage slips for the 6 months preceding the month of reserve service duty.