The underlying measurement framework should be clearly specified. Note: Based on national circumstances, countries may also wish to collect data on activities by children which are outside the general production boundary, such as begging and stealing, and which may need to be considered in the context of the worst forms of child labour. All persons in the age group from 5 to 17 years, where age is measured as the number of completed years at the child's latest birthday (see glossary). It may be designed either as a stand-alone survey or as a module attached to another household-based survey.