The Governor and the State Docks Department, respectively, are hereby directed and required to exercise the power and authority by this article conferred upon them, respectively, to whatever extent is necessary to the accomplishment of the improvement and development hereby authorized. Any approval or consent by the Governor required by this article shall be sufficiently evidenced by a certificate to that effect signed by the Governor and filed in the office of the State Treasurer, and approval or consent by the State Docks Department shall be sufficiently shown by a certificate signed by the director of state docks and attested by the Secretary-Treasurer of the Alabama State Docks Department and filed in the office of the State Treasurer.