Indiana on April 15 U Mich on April 20?

[kleenex89]

I’ve been offered fair amount of scholarship at Indiana, whereas U Mich is still on course with additional funding decisions. I prefer to attend U Mich but I’m not sure if I could with no funding at all. 
Since indiana’s deadline is April 15, can I accept the offer and later on chage to U Mich’s program if I get better offer?

I have carefully read CGS’s april 15 resolution and it seemed I could do so.