Conscription exists in Israel for all Israeli citizens over the age of 18 who are Jewish, Druze or Circassian; Arab citizens of Israel are not conscripted. Other exceptions are made on religious, physical or psychological grounds. The normal length of compulsory service is currently two years and eight months for men (with some roles requiring an additional four months of service), and two years for women.
In 2013, 26% of potential conscripts were exempt from military service. Some 13.5% for religious reasons, 4% for mental health reasons, 2% for physical health reasons, 3% due to criminal records, and 3% due to residing abroad.
The Israeli Defense Service Law (חוק שירות ביטחון) regulates these duties and exceptions. According to the Defense Service Law, the enlistment to the Israeli Defense Forces is mandatory for all Israeli citizens who have turned 18 (with the above-mentioned exemptions enshrined in the Defense Service Law).
In 1949, after the founding of the State of Israel, the Defense Service Law gave the IDF the authority to enlist any citizen. Draftees would then be required to show up for the draft in accordance with the military's decision to enlist them. Under this law, the period of service for men was 30 months and for women 18 months (although in accordance with a temporary order from January 10, 1968, six additional months were added to the mandatory service, 36 months for men and 24 months for women respectively.) The draft requirement applies to any citizen or permanent resident who has reached the age of 18, and in accordance with the law, the individuals who are exempt from the draft are dismissed for various reasons, such as incapability, medical problems, military personnel needs, etc. Many of the soldiers who complete their mandatory military service are later obligated to serve in a reserve unit in accordance with the military's needs.
Economic constraints on the IDF have caused them to reconsider their force structure. With increased news coverage of the IDF, Israelis have become more aware of the IDF's deficiencies. As a result of these two main factors and the inclusion of policy modifications, the IDF have slowly shifted towards a more modern military. A shift towards a professional militia force has caused the IDF to adopt more career-oriented attributes, thus becoming more selective than in prior years. Instead of focusing on “role expansion,” Israel, most specifically its government, is focusing on “nation building.”