The African, Caribbean and Pacific Group of States is raising concerns at the European Commission's planned new approach to aid delivery.
The Commission's Agenda for Change seeks to deliver EU development assistance more efficiently by focussing on key priority areas and targeting resources towards Least Developed Countries, while cutting national allocations to High Income and Upper Middle Income Countries.
The ACP secretary general Dr Mohamed Ibn Chambas says this is not in the spirit of earlier agreements.
He says ACP countries that have achieved favourable economic performance should be supported until they reach a sustainable growth path.
Dr Ibn Chambas says countries should not be unduly punished because they have been able to ensure growth and prosperity through discipline, sound governance and prudent economic policies.