2005 California Civil Code Sections 1146-1148 Article 3. Gifts

1146.  A gift is a transfer of personal property, made voluntarily,
and without consideration.
1147.  A verbal gift is not valid, unless the means of obtaining
possession and control of the thing are given, nor, if it is capable
of delivery, unless there is an actual or symbolical delivery of the
thing to the donee.
1148.  A gift, other than a gift in view of impending death, cannot
be revoked by the giver.