In California there are two forms of conservatorship. The Lanterman-Petris-Short conservatorship starts off being temporary. This one is renewed every year if necessary. A probate (aka slavery) conservatorship does not have a temporary period. It does not automatically expire. Spears is in the latter (the probate form of conservatorship which lasts for around 10,000 years and is one of the most horrific things that can happen to a person).