Questions regarding "admissions minima"

<p>To what extent are these enforced? The McGill website states that applicants to A&S must have achieved an A- in each prerequisite English & Math course and no section of the SAT can be below a 670. In my case, I am an IB Diploma student; while I attained an A in each of my junior IB classes, sophomore year, taking all Honors classed, I got a B in Honors Pre-Calculus. Will this automatically cause the admissions committee to deny me admission? Do they take into consideration course rigor? Additionally, while my composite SAT score is a 2180, I only got a 650 on the Math section; will this force me to send my ACT score instead (31 composite, 28+ in each section)? Or could I send both and avoid sending subject tests? Thank you!</p>