This document discusses the methodology for constructing medium-term expenditure ceilings and allocating budgets to ministries in Brunei. It begins by explaining the purpose of medium-term ceilings, which is to link fiscal and sectoral policies, prioritize spending, and conduct fiscal adjustments in an orderly manner. It then covers the methodology, including setting aggregate and sectoral fiscal targets, disaggregating budgets to ministries, and addressing issues like time horizons, coverage, and managing uncertainty. The document concludes by emphasizing the importance of understanding baselines versus ceilings and the demands this system places on both ministries and the Ministry of Finance.