This document provides an overview of regulatory requirements for pharmaceutical registration in Rest of World (ROW) countries. It begins with definitions of ROW countries and importance of harmonization. It then discusses differences between regulated and emerging markets and provides a comparative study of registration requirements across various regions including ASEAN, GCC, Latin America, CIS, Asia Pacific and Africa. Key requirements discussed include administrative documents, chemistry manufacturing and controls, specifications, stability data, packaging and labeling. Common queries from ROW countries are also summarized.