(a) Within 30 days after the certification of a general plan or amended general plan, or any portion thereof, the board shall, after consultation with the county or a city, establish a date for that county or city to submit the zoning ordinances, zoning district maps, and, where necessary, other implementing actions applicable to the territory of the base.
(b) If the county or a city fails to meet the schedule established pursuant to subdivision (a), the board may waive the deadlines for board action on submitted zoning ordinances, zoning district maps, and, where necessary, other implementing actions, as set forth in Section 67840.4.