The law it changed addresses a rental-market problem, tenants being billed for a broker the landlord hired, that Saskatchewan's Residential Tenancies Act framework does not create in the same way, since a tenant here is not typically charged a landlord's own brokerage fee at all.
On the sale side, the closer Saskatchewan comparison is how seller closing costs work. Those typically run 4 to 6 percent in total, covering commission, legal fees and adjustments together, and the split between listing and buyer's agent commission is set by negotiation and disclosed in writing rather than fixed by regulation.
Nothing about an American rental-fee law changes how a Saskatoon home sale is priced or who pays what. Get your hand-reviewed valuation from Joel Dyck.