No further development may take place on the property included in the plan until the property is resubdivided and is reclassified by an enactment of an amendment to the zoning ordinance if:
1. The plan, or a section thereof, is given approval and, thereafter, the landowner abandons the plan or the section thereof as finally approved and gives written notification thereof to the city or county; or
2. The landowner fails to carry out the planned unit development within the specified period of time after the final approval has been granted.