Except as provided in reg. 16.6.2 of Annex VI, each incinerator on a ship constructed on or after 1 January 2000 or incinerator installed on board a ship on or after 1 January 2000 must meet the requirements in appendix IV to Annex VI, and must be approved by the flag State Administration and possess an IMO Type Approval Certificate. Reg. 16.6.2 permits flag State Administrations to exempt from these requirements any incinerator installed before 19 May 2005 on a ship solely engaged in domestic voyages.