This volume is about the sweeping technical and regulatory changes which have moulded the new regulatory framework of space communications. WARC-92 introduced the LEO systems, WRC-5 confirmed the access of large international corporations to negotiating tables with member state representative, WRC-97 saw the first exchanges of rounds between North America and Western Europe in the planetary quest for new business markets, and WRC-2000 saw the introduction of new technologies that will revolutionize space communications: satellite navigation services and new 3G mobile services, within a context of accelerated commercialization of global telecommunications and many institutional, legal and regulatory questions that remain to be settled. The coming conferences of the next century promise to be challenging. The legal and institutional processes, which charters such unprecedented technical revolution, is still primarly in the domain of international law experts. Yet, several other legal specialities also tackle what space-based communications are: trade, air navigation, culture, eductaion, etc., in intimate contact with legitimate profit-making concerns and strategic interest considerations.