Code of Civil Procedure § 1240.010
ARTICLE 1. General Limitations on Exercise of Power of Eminent Domain
The power of eminent domain may be exercised to acquire property only for a public use. Where the Legislature provides by statute that a use, purpose, object, or function is one for which the power of eminent domain may be exercised, such action is deemed to be a declaration by the Legislature that such use, purpose, object, or function is a public use.