Those who volunteer for military service are free to choose from the three branches of the armed forces (Royal Thai Army, Royal Thai Navy, Royal Thai Air Force). Service obligation varies by educational qualification. Those with a high school diploma or the equivalent and those who have one year of military service education are required to serve for two years if they draw the red card, but if these same individuals volunteer, the service obligation is reduced by half, i.e., reduced to only one year. Those with an associate degree (or equivalent) or higher are required to serve for one year if drafted, but the requirement is reduced to only six months if they volunteered. University students can defer their service as long as they maintain the student status until reaching the age of 27 or obtaining a master's degree or the equivalent, whichever comes first. Undergraduate and graduate students who decide to volunteer are allowed by their institution to put their studies on suspension until the end of term of service. All conscripts, regardless of educational qualification, undergo the same training and receive the same grade and rank upon completion of basic training: private, seaman, or airman (E-1).