Check CDFW's Health Advisories web page for Current Open and Closed Waters for the Spiny Lobster Fishery due to domoic acid, and the California Department of Public Health's interactive shellfish advisory map. Also, be sure to check marine protected area regulations to determine whether marine protected areas at your chosen fishing location permit fishing for spiny lobster.
You may also want to check with local authorities (for example, the harbormaster in the area where you wish to take lobster) regarding any additional restrictions on lobster fishing in harbors, etc. Local authorities have the right to restrict certain activities in these areas in the interest of public safety. Such authorities cannot impose rules that are more lenient than state fishing regulations, but they may impose more stringent restrictions regarding access, for example, in certain high traffic areas if they have concerns about the public's well-being caused by fishing activity in a given area.