Whenever it shall become necessary to execute deeds, mortgages or contracts to carry out any of the provisions of this chapter the Commission may, by resolution duly adopted, delegate the execution and delivery of any such documents to the chairman of the Commission and the State Forester. Such instruments shall be executed in the name of the State Commission of Forestry, shall be signed by the chairman and by the State Forester and, in case of deeds or mortgages, shall be witnessed and probated as required by law. Such instruments, when so authorized by resolution of the Commission, executed as above set out and delivered, shall be in all respects the acts of the State Commission of Forestry and shall be binding upon it as fully as if executed by the members of the Commission themselves.