The Belém Charter, available both in Portuguese and Spanish, creates a permanent forum between the region's mayors, within the Amazon Cooperation Treaty Organisation (ACTO), and includes the objective of "making resilient and sustainable cities".
The Amazon Cities Forum, held on 3 and 4 August 2023, sought to include the specificities and challenges of the Amazon territories in the structuring of a common agenda for sustainability and climate resilience, highlighting the fundamental role of local governments for the conservation and sustainable development of the Amazon. The Amazon Cities Forum ended with the signing of the Belém Charter