California Code, Corporations Code - CORP § 17702.10

An instrument shall be deemed filed, and the date of filing endorsed thereon, upon receipt by the Secretary of State of any instrument accompanied by the fee prescribed in Article 3 (commencing with Section 12180) of Chapter 3 of Part 2 of Division 3 of Title 2 of the Government Code.  The date of filing shall be the date the instrument is received by the Secretary of State unless the instrument provides that it is to be withheld from filing for a period of time not to exceed 90 days or unless, in the judgment of the Secretary of State, the filing is intended to be coordinated with the filing of some other document that cannot be filed.  The Secretary of State shall file a document as of any requested future date not more than 90 days after its receipt, including a Saturday, Sunday, or legal holiday, if that document is received in the office of the Secretary of State at least one business day prior to the requested date of filing.  Upon receipt and after filing of any document under this title, the Secretary of State may microfilm or reproduce by other techniques any filings or documents and destroy the original filing or document.  The microfilm or other reproduction of any document under this section, or corresponding provision under prior law, shall be admissible in any court of law.