(a) Each signatory to this Treaty, and each state or Regional Economic Integration Organisation acceding to this Treaty before 24 April 1998, shall on the date of its signature or of its deposit of its instrument of accession provide to the Secretariat a list of all customs duties and charges of any kind imposed on or in connection with importation or exportation of Energy Materials and Products, notifying the level of such customs duties and charges applied on such date of signature or deposit. Each signatory to this Treaty, and each state or Regional Economic Integration Organisation acceding to this Treaty before 24 April 1998, shall on that date provide to the Secretariat a list of all customs duties and charges of any kind imposed on or in connection with importation or exportation of Energy-Related Equipment, notifying the level of such customs duties and charges applied on that date.

(b) Each state or Regional Economic Integration Organisation acceding to this Treaty on or after 24 April 1998, shall, on the date of its deposit of its instrument of accession, provide to the Secretariat a list of all customs duties and charges of any kind imposed on or in connection with importation or exportation of Energy Materials and Products and Energy-Related Equipment, notifying the level of such customs duties and charges applied on such date of deposit.

Any changes to such customs duties or charges of any kind imposed on or in connection with importation or exportation shall be notified to the Secretariat, which shall inform the Contracting Parties of such changes.