This is another way to join the Army: by becoming part of the Military Reserve, a group of committed citizens from various fields of the work force. This is possible thanks to the existence of units that welcome and train people in order to supplement the staff that may be employed in the event of mobilization, disasters and/or emergencies. This is an unpaid volunteer-based option, with training sessions every Saturday. This is supported by Law No. 2.306 and its Complementary Regulations, which Dictate norms on recruitment and mobilization of the Armed Forces.