This document discusses the roles and functions of research ethics committees (RECs) and institutional review boards (IRBs). It provides an overview of when REC/IRB approval is required, the review process, and composition of RECs/IRBs. It also discusses interactions between IRBs in different countries and the roles of data safety monitoring boards. The document is authored by Dr. Tamer Hifnawy, an associate professor of public health in Egypt and Saudi Arabia who trains others in international research ethics.