AHHH that is simple you are either meat fishing or pleasure fishing.. There is no both ways..

You keep a fish you best only have one marked...

Yes there is a hole that non law obiding sportsmen and women could certainly not mark their fish off and keep one and only mark that one.
Pick one either you want to fish for meat or for fun.. I know why I go! I feel accountable as I know I practice common sence and do not abuse the resources...