This paper discusses conceptual and operational issues related to regional surveillance for East Asia, which is a topic that has assumed considerable prominence in recent months. The need for regional surveillance is both immediate and evolving. For the immediate need, a surveillance mechanism must cover the operational requirements of the Chiang Mai Initiative Multilateralization (CMIM) as a conditional lending facility. At the same time, it must also respond to East Asia's evolving need for a formal framework of policy dialogue and cooperation as economic integration deepens and macroeconomic interdependence strengthens.;The paper discusses six principles that can help guide the design of an effective regional surveillance mechanism for East Asia: (i) avoid duplication with other organizations, (ii) clearly define the purpose of surveillance, (iii) centralize surveillance activities in a single organizational unit, (iv) use objective indicators to inform analysis, (v) design the governance structure to ensure independence, and (vi) provide analysis and recommendations directly to senior policymakers.