Transfer into Leeds from Arts&Sciences

My S has been accepted to Boulder into his 2nd choice major, Economics, in the School of Arts and Sciences. First choice major was marketing in the Leeds Business School. If he earns the required overall GPA to be considered for transfer his freshman year, and completes pre-req classes, would anyone know the statistics of how easy/difficult students get accepted to the business school through IUT (IntraUniversity Transfer)?

Here are the rules, and I have heard that if a student meets the criteria he can transfer into Leeds.
He must take and pass specific math and economics classes, with a B- or better.
https://www.colorado.edu/business/undergraduate-advising/transfer-leeds-iut