Communicate these to your recommendor. You may wish to provide the writer with a resume, transcript, a list of schools to which you will apply, or a copy of your personal statement. Law schools do not differentiate between recommendor's rank. They are more interested in hearing from an assistant professor who knows you well than from a dean who barely recognizes your name. Consider your relationship with professors carefully and choose those who can write honestly and specifically about your qualifications.
Some law schools require that one recommendation come from a dean or university official.
If you are not personally acquainted with an official, contact your pre-law advisor. The Career Planning and Teacher Placement Center, located in McKinney Center, offers students a convenient recommendation service. You should register with the office in the early fall of your senior year. Recommendors will return their letters directly to the CPPC office. When you want copies of these letters to be mailed to law schools, you should request them from this office.