On September 4, 2012, San Diego Regional Enterprise Zone was approved for an expansion. The expansion added a total of 2889 acres to existing zone that is north of Interstate 8. The SDREZ now includes Rancho Bernardo, Miramesa, Kearny Mesa, Grantville, North Bay, Delevan Drive Properties, National City, and 4 separate areas within Chula Vista. The Eastlake Business Park is one of the main landmarks included in the 4 areas in the Chula Vista expansion.