This document provides revised guidelines on the project application process to the fourth round of applications for funding from the Special Programme Trust Fund. The terms of reference for the Special Programme, as outlined in annex 1, were adopted under UNEA resolution 1/5 with the aim of supporting developing countries and countries with economies in transition in strengthening institutional capacity for the implementation of the Basel, Rotterdam, and Stockholm Conventions, the Minamata Convention and the Strategic Approach to International Chemicals Management.