I never knew there was such a thing. A quick Google shows that several other law schools offer the same. I'm not sure what you'd use it for, though.
For much the same reason you would want an MBA. If you studied some other field (say, geology) and practiced it as an individual contributor, you might want to seek an MBA if you plan to open your own geology consulting firm, hire employees, and transact business appropriately. I'm a part owner in a number of businesses, but my co-owners in those cases have business administration degrees and handle all that. Most MBA programs are tailored so that classes and study are outside of business hours, allowing you to pursue your primary field of expertise while you learn to run a business.
Similarly the MLS degree is intended for practicing professionals who need a greater understanding of the law, and possibly need to obtain it while practicing their primary comptency. A trained geologist might pursue one if he intended to serve as an expert witness in court. Or if he is joining a law firm that specializes in mineral-rights law as its in-house geology expert. And the law school would provide an educational posture compatible with his day job smashing rocks with hammers.
There is no bachelor's degree in law in America. The master's degree in law does not qualify you to become licensed to practice law, and has no specialized prerequisite degree. The
juris doctor degree qualifies you to apply for admission to the bar, to sit for the exam, and eventually to practice law; it has no specialized degree requirement beyond a bachelor's degree in any subject. There is a specialized licensure-track degree (LLM) that requires a JD, and—if in patent law—a bachelor's degree in the field pertaining to your patents. And there is an additional academic degree in law that is equivalent to a PhD in other fields: the
scientiae juridical doctor, or SJD. This requires a JD and is generally intended for those who wish to become law professors or academic legal scholars. Our school does not offer it. It is a matter of ribald debate whether professional doctoral-level degrees (
e.g., a JD) should be considered equivalent to academic doctorates, hence the debate over whether JDs can be addressed as "doctor" and whether an SJD candidate is a doctoral student or a post-doctoral student.
Similarly our architecture school offers a Master of Architecture as its entry-level degree. It does not grant a Bachelor of Architecture. The MA program lasts five years and requires only a high-school diploma to enter. That is, it's the equivalent amount of study you would get from accelerated bachelor's and master's programs and requires the same entry criteria as other programs do for entry into a bachelor's level program. It would be incorrect to say that a fifth-year architecture student is in a post-graduate program.