[OK to fish on Poplar Island or is it off limits?]

Thanks everyone.

[OK to fish on Poplar Island or is it off limits?]

This might be a dumb question, but I'd like confirmation as I'm still quite new to this.  I crossed the side channel at Bankside to get onto Poplar Island and then noticed a City of Calgary sign in the bushy area away from the water.  I should have taken a pic of it so I could post it, but in a nutshell, the sign says the area is off limits and you could be fined $172.  My question is:  Does that only apply to those bushy areas or is it for the entire island?  I asked an experienced angler and he didn't realize you could get fined there.  I've also seen drift boaters land on the island and fish from there while I was on the other side of the river.  I tried Googling it but couldn't find anything.

Does anyone know for certain that you can or cannot fish from Poplar Island?  Thanks.