<p>The American Bar Association, the accrediting body for law schools in the U.S., has stated the following in its accreditation requirements (with selected ABA interpretations):</p>
<p>Standard 304. COURSE OF STUDY AND ACADEMIC CALENDAR. </p>
<p>(a) A law school shall have an academic year of not fewer than 130 days on which classes are regularly scheduled in the law school, extending into not fewer than eight calendar months. The law school shall provide adequate time for reading periods, examinations, and breaks, but such time does not count toward the 130-day academic year requirement.</p>
<p>(b) A law school shall require, as a condition for graduation, successful completion of a course of study in residence of not fewer than 58,000 minutes of instruction time, except as otherwise provided. At least 45,000 of these minutes shall be by attendance in regularly scheduled class sessions at the law school. </p>
<p>(c) A law school shall require that the course of study for the J.D. degree be completed no sooner than 24 months and not longer than 84 months after a student has commenced law study at the law school or a law school from which the school has accepted transfer credit. </p>
<p>(d) A law school shall require regular and punctual class attendance.</p>
<p>(e) A law school shall not permit a student to be enrolled at any time in coursework that, if successfully complete, would exceed 20 percent of the total coursework required by that school for graduation (or a proportionate number for schools on other academic schedules, such as a quarter system). </p>
<p>(f) A student may not be employed more than 20 hours per week in any week in which the student is enrolled in more than twelve class hours.</p>
<p>Interpretation 304-2:
A law school may not count more than five class days each week toward the 130-day requirement.</p>
<p>It would be very tough to fulfill these requirements, as well as the other requirements for graduation from an accredited law school (upper level writing course, ethics course, certain courses during first year of law school (torts, property, criminal law, constitutional law, contracts, etc.), without staying in law school for at least three years. Admittedly, while you are there, the third year may at times seem arguably unnecessary, but I don't know of a law school program that you can complete in less than three years. All of the JD/MBA programs of which I am aware are four year programs, which represents one year less than the programs would take to complete separately.</p>