Guiding?

[fishinkid2010]

Recently I was talking with a family friend who runs a charter/ guiding service in Alaska. He made mention of the difficulty to keep a guide license with all the laws and regulations that the state has in place. He asked me if it was like that here in San Diego; particularly for a kayak fishing guide, but I had no idea. Does anyone know anything about our city's/ state's laws regarding this? I'd like to be able to answer his question the next time I talk with him. I know that a few people kayak guide here in San Diego, but it seems like there are very few compared to how many I've seen on the Kenai River in the summer months.
Thanks