Declaring your major is not the same thing as being admitted to your degree program. Declaring a major simply identifies your intent to pursue a particular major. Being admitted to your degree program signifies two important things: (1) You have satisfied all the requirements to be admitted to your major program; and (2) The graduation requirements for your degree program are "locked in." In other words, if changes are made to your major's requirements after you've been admitted, those changes would not apply to you.
Completing "the Core." In order to be admitted, you must have completed COM 115 Fundamentals of Public Speaking, MED 120 Media and Society, and COM 209 Survey of Communication Theory with a combined GPA of 2.50 or better in those three courses. For the Public Relations major you also must complete JRN 270 and achieve a combined GPA of 2.50 or better in those four courses.
Taking COM courses before you've been admitted. While you should compete the Core as early as you can and many upper division courses have completion of the Core as a prerequisite, there are several "pre-major" courses you may take prior to being admitted. These courses include: