There is no process for declaring that a student is pre-law. Instead, pre-law students should focus on their academic efforts by taking courses and exploring learning opportunities that help hone skills, develop passions, and promote personal and professional growth. It is important to remember that law-school admissions committees rely heavily on undergraduate GPA and the LSAT.  However, these metrics are only part of the application review process because law school applications are reviewed holistically, so every component of the application matters.