Domestic partnership in California

Domestic partner registration is an uncomplicated process, more simple and less costly than entering into a marriage. Both parties must sign a declaration listing their names and address. Both signatures must be notarized. The declaration must then be transmitted to the Secretary of State along with a $10 filing fee (plus an additional $23 fee for same-sex couples to help fund LGBT-specific domestic violence training and services). In this regard it is not like a marriage or civil union. Those unions require a ceremony, solemnized by either religious clergy or civil officials, to be deemed valid.

Is this statement correct "do you have to register as a domestic partner in california"?
yes