Unlike the general bar examination, for which graduation from a recognized law school is a prerequisite, the USPTO exam does not require that the candidate have taken any law school courses. Instead, the main prerequisite is a science or engineering background, most often met with a bachelor's degree in a relevant field. Individuals who pass the examination are referred to as "patent attorneys" if they have an active law license from any U.S. jurisdiction, and "patent agents" otherwise. Attorneys and agents have the same license to represent clients before the patent section of the USPTO, and both may issue patentability opinions. However, any other patent-related practice (such as licensing or infringement litigation) can only be performed by licensed attorneys—who do not necessarily have to be USPTO-licensed.