"Generally, LLC are subject to annual tax with or without income as long as LLC is active. Depending on the state of incorporation, LLC is exempted to an annual tax during the first year of operation or taxable year was 15 days or less."
So first year of operation is also exempted in California from filing Form 568 or only if taxable year was 15 days or less? So far I have not seen a clear and cut answer on whether it is required to file an initial and final form 568 for California without any Form 1065 for IRS, if LLC was active for 18 days and there was no income/expenses during that time.
