Each CIS School can offer a player an AFA (Athletic Financial Award) up to that school's tuition and fees. There is a cap on the number of AFA's a hockey program can offer - I believe it's 75% of your roster.
Also - a program can slice and dice the AFA money any way they want - they are under no obligation to offer an AFA and when they do, it does not have to be a Full AFA (eg. you may offer half AFAs to a pair of depth guys, accounting for 1, while going full AFA for your top line guys).
Finally, I believe a program can increase their AFA allocation by one player for each Academic All-Canadian they have on the roster. A rewarded for recruiting quality academics.
So, I don't know if you would call it negotiate as the hockey program is under now obligation to give you an AFA, but a lot of school's will offer AFAs to their top recruits.