No mortgage guaranty insurer may invest in notes or other evidences of indebtedness secured by a mortgage or other lien upon real property. This section shall not apply to obligations secured by, or contracts for the sale of, real property, which obligations or contracts of sale are acquired in the course of the good faith settlement of claims under policies of insurance issued by the mortgage guaranty insurer, or in the good faith disposition of real property so acquired.
Cal. Code Regs. Tit. 10, § 2521