The Planning Board shall act on the plat within the applicable time period set forth in this chapter. Failure of the Planning Board to act within the applicable time period or within a time extension mutually agreed upon shall be considered an approval. If the Planning Board disapproves a plat, the reasons for the disapproval shall be communicated in writing to the applicant within 10 days of the date of the decision and advertised as required by § 30-11 of this chapter. No action shall be taken until receipt of the County Planning Board review or until 30 days have elapsed from date of referral to the County Planning Board.

If substantial changes or amendments are required, such as changes to the drainage and circulation pattern, lot configuration or number of lots, as a result of the public hearing or of the Planning Board deliberations, the applicant may be required to resubmit the plat for preliminary approval.