This is why it's critical to get your own copy of the regs and read it fully before heading out on any body of water. Like Misfish said...read the regs.
Xrap is correct for Division 4 that you are planning to fish, but for other outings/people reading this thread... Limits apply many places other than Couch and Simcoe.
Divisions # 1/2/5/16/17/20/21/22/22A/24/27(Nippissing -where there is also a season!)/28/30/31/32/33/34 all have limits on Perch