Do I need to have completed prerequisite courses in high school for university electives?

I am hoping to attend Simon Fraser University in a year, and I want to study political science and anthropology. Naturally, I've filled my senior year of high school with history, social justice, and law courses. However, I would also like to take physics as an elective in university, on the side to poli sci.

I did not end up taking a math for senior year, as my schedule was full. The only STEM class I took was Physics 12, because I love it so much.

I was wondering if I needed to fulfill the general requirements for admission to the science faculty (2 sciences 12's and a math 12) in order to take physics as an elective? Or does it not matter, since it isn't my primary field of study?

Thank you very much in advance!