The work programme of the secretariat for the biennium 2024–2025 outlines the core budget, supplementary and other resources required by the secretariat to implement its mandates and achieve the stated objectives and expected results. This document provides an update reflecting adjustments to the work programme arising from decisions adopted by the governing bodies and conclusions adopted by the subsidiary bodies in 2023. The update also reflects adjustments made as a result of a review undertaken in the first quarter of 2024 of the budgetary requirements for supplementary activities with the aim of focusing on funding those activities that are strictly required to be undertaken in response to requests of the governing and subsidiary bodies. The document should be read in conjunction with document FCCC/SBI/2023/2/Add.1/Rev.1, which contains the revised work programme of the secretariat for the biennium 2024–2025, and decision 19/CP.28, which contains the approved programme budget for the biennium 2024–2025.