Section 428.20.

Cal. Code of Civil Procedure - CCP § 428.20.
in effect
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When a person files a cross-complaint as authorized by Section 428.10, he may join any person as a cross-complainant or cross-defendant, whether or not such person is already a party to the action, if, had the cross-complaint been filed as an independent action, the joinder of that party would have been permitted by the statutes governing joinder of parties.
Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026

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