There is hereby established for the purposes of this Act a body to be called the Belize Port Authority. It shall be the duty of the Authority- (a) to operate the ports as appears to it best calculated to serve the public interest; (b) to regulate and control navigation within the limits of such ports and their approaches; (c) to maintain, improve and regulate the use of such ports and services and facilities therein as it considers necessary or desirable; (d) to provide for such ports and the ap