I am not sure of the whole Bass picture and I wouldn't disagree that it is wrong to deliberately catch spawning fish.
However, bans and quotas have been going on since the 60's since we first became aware of the decline in sea fish stocks. All sorts of permutations have been tried for the last 60 years and none of them have had much effect. Mackerel. Bass, Whiting, Plaice and just about everything else continues to decline. Cod have made some resurgence but nothing near the levels they once were.
They don't work, its a case of always playing catch up. Introduce a new quota or ban, find a couple of years later it has not worked and introduce a more stringent quota or ban, its always behind the game and fish just continue to decline; it might slow it down a bit but the end result will be the same and Bass will continue to decline despite these efforts watered down or not; as will almost everything else...
How long does a thing have to not work before someone wakes up!
The only system I have heard of that does work is to introduce large PERMANENT no go - no fishing areas to act as larders for the rest of the seas. Agreed internationally and easy to police whereas semi bans/quotas/size limits are not. For one thing they could easily be observed by satellites. The ocean floor will thrive as will everything else in these areas. They will spill over into the rest of the oceans for us to harvest while ALWAYS maintaining a good base stock of fish species and sea life..