The governing body of the county or city may not accept or approve any grant of an open-space easement until the matter has first been referred to the county or city planning department or planning commission and a report thereon has been received from the planning department or planning commission. Within 30 days after receiving the proposal to accept or approve a grant of an open-space easement, the planning department or planning commission shall submit its report to the governing body. The governing body may extend the time for submitting such a report for an additional period not exceeding 30 days. The report shall specify whether the proposal is consistent with the

general plan of the jurisdiction.