the Secretary of Commerce shall require each person exporting such timber from the United States to declare, in addition to the information normally required in the Shipper’s Export Declarations, the State in which the timber was grown and harvested; and

the Secretary of Agriculture and the Secretary of the Interior shall ensure that all hardwood saw timber harvested from Federal lands east of the 100th meridian is marked in such a manner as to make it readily identifiable at all times before its manufacture, and shall take such steps as each Secretary considers appropriate to ensure that such markings are not altered or destroyed before manufacturing.