Decisions made under this code are effective on the date of approval or disapproval unless otherwise indicated by the decision-making body or if the decision is subject to a vesting period. An appeal shall stay all proceedings in the matter appealed from, unless the zoning administrator certifies in writing to the decision-making body that, by reason of the fact stated in the certificate, the stay would, in his opinion, cause imminent peril to life or property. In such case, proceedings shall not be stayed, except by a restraining order granted by a court of competent jurisdiction on application and notice to the zoning administrator. In the event that a decision made under this code is appealed, the appeal does not invalidate the approval. The holder of the approval may proceed with a use or development at their own risk. Any appeal granted may be subject to such conditions as the decision-making body on the appeal deems applicable.