Subject to this Act—
( a ) the agreement is hereby ratified and validated as from the date of execution thereof;
( b ) the Minister the Commissioners and the company are hereby authorized and empowered and shall be deemed to have been authorized and empowered to enter into the agreement and to carry the same into effect; and
( c ) the agreement shall take effect notwithstanding anything in the Land Acts, the Melbourne Harbor Trust Acts, or any other Act or enactment.