Enforcing this (albeit the easiest is blatant fishing in a SMR) will be difficult to do. I mean it's not like there is physical markings that show these sections; crossing into the grid line a couple hundred yards is easy to do if you don't have a GPS.
The worst thing about MLPA is that because we are citizen's, we are required to have some innate sense about these laws (insofar as this isn't common disseminated knowledge). The exuse "Your Honor, I didn't know" will not suffice!
If the sign isn't posted where I launch....then I'm fishing there!!