The order granting the conduct of a certification election - in an organized establishment and - the decision dismissing or denying the petition, whether in an organized or unorganized establishment, may be appealed to the Office of the Secretary within ten (10) days from receipt thereof. (Book V, Rule VIII, Sec. 19.) Decision of the Secretary ( Book V, Rule VIII, Sec. 23) The Secretary shall have fifteen (15) days from receipt of the entire records of the petition within which to decide the appeal. The filing of the memorandum of appeal from the Order or Decision of the Mediator-Arbiter stays the holding of any certification election. The decision of the Secretary shall become final and executory after ten (10) days from receipt thereof by the parties. No motion for reconsideration of the decision shall be entertained.