Cal. Ins. Code § 11140
The commissioner, or any person whom he may appoint, may examine any foreign society, transacting or applying for admission to transact business in this State. He may employ assistants and he, or any person he may appoint, shall have free access to all books, papers and documents that relate to the business of the society. He may summon, qualify as witnesses under oath and examine any persons in relation to the affairs, transactions and condition of the society. He may in his discretion accept, in lieu of such examination, the examination of the insurance department of the state, territory, district, province or country where such society is organized. The compensation and actual expenses of the examiners making any examination or general or special valuation shall be paid by the society examined or by the society whose certificates obligations have been valued, upon statements furnished by the commissioner.
Ca. Ins. Code § 11140