The Legum Magister or Master of Laws degree is an advanced law degree that is usually only open to those who have a first law degree. For U.S. students, entry into an LLM program requires completion of a JD degree. For international students, entry into an LLM program typically requires completion of a first (LL.B.) degree in law. The LLM degree allows a candidate to specialize in a particular area of law or become familiar with another country's legal system. The LLM degree is typically awarded after successful completion of one year of full-time post-graduate law study (a part-time option, extending study over a longer period, is available at some law schools). If other requirements are met, an LLM degree may qualify a foreign-trained law graduate to sit for some states' bar exams.