Section 1101 turns the fiduciary duty spouses owe each other over community property into something enforceable. Subdivision (a) gives a spouse a claim against the other for any breach of the fiduciary duty that results in impairment to the claimant's present undivided one-half interest in the community estate, whether the breach was a single transaction or a pattern or series of them.
The court's tools are broad. Subdivision (b) allows an accounting of the property and obligations, and a determination of ownership, beneficial enjoyment, access and classification of all property. Subdivision (c) allows the court to add a spouse's name to community property held in the other's name alone, or to reform the title to reflect its community character, with exceptions for a general partnership interest, an interest in a professional corporation or association, an asset of an unincorporated business the other spouse alone operates, and any property where the change would adversely affect a third party.
The remedies are where the section bites. Subdivision (g) provides that remedies for breach include an award to the other spouse of 50 percent, or an amount equal to 50 percent, of any asset undisclosed or transferred in breach of the fiduciary duty, plus attorney's fees and court costs — valued at the asset's highest value at the date of the breach, the date of disposition, or the date of the award. Subdivision (h) raises that to 100 percent where the breach falls within Civil Code § 3294, the punitive damages provision, which covers oppression, fraud or malice. Timing is set by subdivision (d): three years from actual knowledge of the transaction or event, except that an action may be brought on a spouse's death or with a dissolution, legal separation or nullity proceeding without regard to that limit, with laches available as a defence. Subdivision (f) allows the action without filing for dissolution at all. These are technical claims with severe consequences, and they belong with a family lawyer.