Typically, men are required to serve for 2 years and 8 months, while women for 2 years. Officers and other soldiers in certain voluntary units such as Nahal and Hesder are required to sign on for additional service. Those studying in a "Mechina" (pre-induction preparatory course) defer service until the conclusion of the program, typically one academic year. An additional program (called "Atuda'i") for qualified applicants allows post-secondary academic studies prior to induction. There is a very limited amount of conscientious objection to conscription into the IDF. More common is refusal by reserve soldiers to serve in the West Bank and Gaza. Some of these conscientious objectors may be assigned to serve elsewhere, or are sentenced to brief prison terms lasting a few months to a year and may subsequently receive dishonourable discharges. After a year their period of regular army service, men are liable for up to 30 days (much less on average) per year of reserve duty ("miluim") until they are in their early forties. Women in certain positions of responsibility are liable for reserve duty under the same terms as men, but are exempt once they are pregnant or with children. Jordan As of 2020, Jordan has reinstated a compulsory year of military service for those that meet the criteria. Unemployed men aged 25 to 29 are the target group of the conscription program. Mexico , all males reaching eighteen years of age must register for military service (Servicio Militar Nacional, or SMN) for one year, though selection is made by a lottery system using the following color scheme: whoever draws a black ball must serve as an available reserve, that is, he must not follow any activities whatsoever and get his discharge card at the end of the year. The ones who get a white ball serve Saturdays in a Batallón del Servicio Militar Nacional (National Military Service Battalion) composed entirely of one-year SMN conscripts. Those with a community service interest may participate in Literacy Campaigns as teachers or as physical education instructors. Military service is also (voluntarily) open to women. In certain cities, such as Mexico City and Veracruz, there is a third option: a red ball (Mexico City) and a Blue ball (Veracruz), which entails serving a full year as a recruit in a Paratrooper Battalion in the case of Mexico City residents, or an Infantería de Marina unit (Navy Marines) in Veracruz. In