California Code, Financial Code - FIN § 16600

(a) A foreign (other nation) credit union that has a license to establish and maintain an office may engage in activities at the office as may be authorized under applicable laws of its home country and the laws of this state.

(b) Nothing in subdivision (a) authorizes a foreign (other nation) credit union to engage in any activity at an office that it is not authorized to engage in or is prohibited from engaging in under the law of its home country, or that credit unions organized under the laws of this state are not authorized to engage in or are prohibited from engaging in under the laws of this state.