To invite parties to provide to the Ozone Secretariat , by 31 March 2013 , information relevant to paragraph 1 above ; B . Clean production of hydrochlorofluorocarbon22 through by-product emission control Recognizing the opportunity to facilitate a clean production approach to the manufacture of hydrochlorofluorocarbon-22 ( HCFC-22 ) for both controlled and feedstock uses , Recalling decision XVIII/12 , in which the parties requested the Ozone Secretariat to facilitate consultations by the Technology and Economic Assessment Panel with relevant organizations to enable the Panel to draw on the work already carried out under those organizations , including work relating to HCFC-22 ,