; 87 degrees, 43 minutes, 44.8536 seconds west longitude. 6. Prohibition of certain uses (a) Prohibited activities The following activities are prohibited and thus are unlawful for any person to conduct or to cause to be conducted within the Sanctuary: (1) Harvesting the trees or other resources of the sanctuary. (2) Any type of subsurface salvage or recovery operation. (3) Lowering below the surface of the water any grappling, suction, conveyor, dredging, or wrecking device. (4) Detonating below the surface of the water any explosive or explosive mechanism. (5) Drilling or coring the seabed. (6) Lowering, laying, positioning, or raising any type of seabed cable or cable-laying device. (7) Discharging waste material into the water in violation of any Federal statute or regulation. (b) Rules of construction The prohibitions contained in subsection (a) shall not be construed as to: (1) Restrict fishing, diving, anchoring, or any other recreational or commercial sea activities that do not cause an adverse effect to the resources or property of the Sanctuary or that do not pose harm to users of the Sanctuary. (2) Apply to necessary operations of public vessels. For the purposes of this paragraph, necessary operations of public vessels shall include operations essential for national defense, law enforcement, and responses to emergencies that threaten life, property, or the environment. (c) Effective date This subsection shall be effective upon enactment of this Act. 7. Comprehensive management plan (a) Preparation of plan The Secretary of Commerce, in consultation with appropriate Federal, State, and local government authorities and with the Advisory Council established under section 8, shall develop a comprehensive management plan and implementing regulations to achieve the policy and purpose of this Act. The Secretary of Commerce shall complete such comprehensive management plan and final regulations for the Sanctuary not later than 18 months after the date of enactment of this Act. In developing the plan and