California Code, Insurance Code - INS § 1173

Such insurers may invest in obligations issued under authority of law by any county, municipality, or school district in this State or in any other state, or in any province of the Dominion of Canada or in any political subdivision of the Commonwealth of Puerto Rico, if the obligor has not within two years next preceding the investment defaulted for more than 90 days in the payment of any part of either principal or interest upon any legally authorized obligation issued by it, and the obligations of the state or province or political subdivision in which it is located are legal for investment under the provisions of Sections 1172 or 1174.