As an undergraduate, you must declare an additional concentration no later than your seventh semester. By faculty rules, an additional concentration must be approved by the concentration advisor in ASK by 5 p.m. ET on the last day of classes in the student’s penultimate — typically seventh — semester (see the Academic Calendar for specific dates). This deadline exists to ensure that first, students are intentional in their decision-making (rather than approaching the end of their studies and noticing how close they are to completing another concentration); and second, to ensure that faculty and staff in the concentration and University have time to appropriately advise and clear students for their degree. This is a firm deadline and exceptions to the deadline are quite rare.
You may double concentrate if you are able to complete all requirements for both fields in the standard eight-semester sequence of study. You may also petition for an optional ninth semester if you wish to add a second concentration and need additional time in which to complete requirements. A double concentration would appear on your transcript as follows: "Bachelor of Science: Sc.B. Environmental Science and A.B. Math" or "Bachelor of Arts: A.B. Africana Studies and A.B. English."