For a student wishing to study for a semester or year abroad, there are no formal programs open to all law students.
Most programs are only open to the student of the sponsor university.
If you wish to study on a program not available through your law school, you will probably have to create you own program. This task need not be too formbidable. However, there are ABA rules that need to be met, and cooperation must be obtained from both your home and abroad institutions. Search the world law school index from Hieros Gamos for the law schools that you might be interested in attending. Contact those institutions to request a program brochure for foreign exchange or L.L.M. students.