6.Also reiterates the request to the Secretariat contained in decision BC-10/16 in respect of the development of a guidance manual, in cooperation with the International Maritime Organization, on how to improve the sea-land interface to ensure that wastes falling within the scope of the International Convention for the Prevention of Pollution from Ships, 1973, as modified by the Protocol of 1978 relating thereto and as further amended by the Protocol of 1997, once offloaded from a ship, are managed in an environmentally sound manner, subject to the availability of resources;