California Code, Government Code - GOV § 50112

When copied, the book, document, map, or record shall be carefully compared with the original.  The persons comparing shall each make an affidavit which shall be incorporated into the book, document, map, or record as copied, that it and each part of it is a true copy of the original;  that the matter of record which appears upon every page of the original appears also upon the same page of the copy;  and that no matter of record appears upon any page of the copy which is not upon the same page of the original.  The officer having custody of the book, document, map, or record shall certify upon the copy that it is a true copy of the original.