Reaffirming that all States, including those which have or assume responsibility for the administration of N on-Self-Govpendence, should take all appropriate measures with a view to abolishing such customs, ancient laws and practices by ensuring, inter alia, complete freedom in the choice of a spouse, eliminating completely child marriages and the betrothal of young girls before the age of puberty, establishing appropriate penalties where necessary and establishing a civil or other register in which all marriages will be recorded,