(n)
Shall provide that the respective parties to the award will each faithfully execute the same.
The said agreement to arbitrate, when properly signed and acknowledged as herein provided, shall not be revoked by a party to such agreement: Provided, however, That such agreement to arbitrate may at any time be revoked and canceled by the written agreement of both parties, signed by their duly accredited representatives, and (if no board of arbitration has yet been constituted under the agreement) delivered to the Mediation Board or any member thereof; or, if the board of arbitration has been constituted as provided by this chapter, delivered to such board of arbitration.