Do I have to retake State Boards?

Hi. I am currently waiting to get into the RN program and if all goes well I should be graduating with the BSN in Summer 2011. The problem is that I live in GUAM (a US territory). Although the RN prog at the local university is accredited by the California State Boards, the questiion is whether I will have to retake the boards once I return to So Cali in order to work as an RN there?
Any help would be greatly appreciated...