An ad hoc review between scheduled reviews can be requested by a program country when the increase in the underlying balance of payments problems cannot await the next scheduled review. Ad hoc reviews require an assessment by the IMF Executive Board that the program is on track to achieve its objectives.
Arrangements under the ECF provide financial assistance that is more flexible and better tailored to the diverse needs of low-income countries (LICs), including in times of crisis (e.g. protracted balance of payments problems). Those under the EFF provide assistance to countries experiencing serious payment imbalances because of structural impediments or slow growth and an inherently weak balance-of-payments position.