JB MDL Fishing Permit Required. The daily limit of trout taken is four. All other species, sizes and limits will be in accordance with state regulations unless otherwise posted at specific lakes. When four trout have been caught in any trout stocked water on JBMDL, fishing must be discontinued for that day in any trout stocked water on JBMDL. Throwing trout back in the lake once they are caught is not permitted. However, after reaching the four trout limit, you may go to a non-stocked lake on JB MDL and fish.