Many developing countries operate geographically delineated economic areas in the form of export processing zones, special industrial zones, or free trade zones. This paper provides an overview of the application of World Trade Organization disciplines to incentive programs typically employed by developing countries in connection with such special economic zone programs. The analysis finds that the disciplines under the Agreement on Subsidies and Countervailing Measures have the most immediate relevance for middle-income World Trade Organization members that are not exempt for certain "grandfathered" programs, but will also concern other developing countries in the future, as their exemption expires or their per-capita income passes a threshold of US$1,000. Incentives related to special economic zones can be broadly grouped into three categories: (i) measures that are consistent with the World Trade Organization, notably exemptions from duties and taxes on goods exported from special economic zones; (ii) measures that are prohibited or subject to challenge under World Trade Organization law, notably export subsidies and import substitution or domestic content subsidies; and (iii) and measures where World Trade Orgainzation consistency depends on the facts of the particular case. The paper provides a set of recommendations on how to eliminate questionable incentives. The single most important zone policy reform to achieve World Trade Organization compliance is to remove all requirements.