As for the legality of it, you should check with your state Wildlife Management agent. Not all states are the same...... I like using PVC but to be honest with you I've found that full length bamboo tied to concrete blocks works great. They float up, they take years to decay and they are great attractors when placed on the right structure. I put 5 to a bundle and sink them with one block. I place 5 to 10 bundles in the same area and years later I'm still catching fish off of them.