Yes I can vouch for the rules being implemented, one of our friends has recently had his rods confiscated on the lakes above Riba Roja as he was using live bait and did not have a special daily ticket for fishing on the lakes, could be costly, I am in the process of investigating the fine now and will let you know!

Below is a link from the Media Ambient stating the rules, what it does not say is where you need special Day Permits and as usual all signs are in Catalan, so a tourist has no chance, and ignorance of the law and the language is no excuse, well they do not want tourism they do anyway!

http://mediambient.gencat.cat/eng//el_medi/pesca/com_pescar.jsp

So if you have freinds or family staying and they want to do some fishing make sure they know all the rules!!