CIV §843: (a) If real property is owned concurrently by two or more persons, a tenant out of possession may establish an ouster from possession by a tenant in possession in the manner provided in this section.

(a) If real property is owned concurrently by two or more persons, a tenant out of possession may establish an ouster from possession by a tenant in possession in the manner provided in this section. This section does not apply to the extent the tenant out of possession is not entitled to possession or an alternative remedy is provided under the terms of an agreement between the cotenants or the instrument creating the cotenancy or another written instrument that indicates the possessory rights or remedies of the cotenants. This section supplements and does not limit any other means by which an ouster may be established. (b) A tenant out of possession may serve on a tenant in possession a written demand for concurrent possession of the property. The written demand shall make specific reference to this section and to the time within which concurrent possession must be offered under this section. Service of the written demand shall be made in the same manner as service of summons in a civil action. An ouster is established 60 days after service is complete if, within that time, the tenant in possession does not offer and provide unconditional concurrent possession of the property to the tenant out of possession. (c) A claim for damages for an ouster established pursuant to this section may be asserted by an independent action or in an action for possession or partition of the property or another appropriate action or proceeding, subject to any applicable statute of limitation. (d) Nothing in this section precludes the cotenants, at any time before or after a demand is served, from seeking partition of the property or from making an agreement as to the right of possession among the cotenants, the payment of reasonable rental value in lieu of possession, or any other terms that may be appropriate.