The World Telecommunications Standardization Assembly 04 (WTSA-04) adopted Resolution 29 on alternative calling procedures on international telecommunication networks. In that Resolution, the sovereign right of each country to regulate its telecommunications, as expressed in the basic instruments of ITU, was reaffirmed. In this regard, each country has the right to authorize, prohibit or regulate call-back practices. National regulatory measures must be respected by other countries within the limits of their own legislation, and the recognized operating agencies (ROAs) and administrations concerned must communicate and collaborate.
To facilitate this collaboration, a draft guideline has been prepared under which ITU is to collect information once a year on the positions adopted by each country in respect of call-back practices within its territory and disseminate the findings by the most effective method. Administrations and ROAs receiving this information must take all necessary steps to prevent call-back practices from being supplied to countries which prohibit them. The TSB has circulated the questionnaire each year since 1996. The results were disseminated by a TSB Circular.