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On June 8, 2026, the Central Bank of Brazil published version 6.00 of the Manual de Segurança do Sistema Financeiro Nacional (National Financial System Security Manual). The updated manual is available on the Central Bank's website at https://www.bcb.gov.br/estabilidadefinanceira/comunicacaodados. The most significant change in version 6.00 is the introduction of a second volume dedicated to Pix security. This new volume consolidates security content previously published separately in the Manual de Segurança do Pix (Pix Security Manual). The manual now comprises two volumes addressing security requirements across Brazil's financial system and its instant payment infrastructure. Most provisions of the updated manual take effect immediately upon publication. However, specific requirements have staggered implementation timelines. Alterations to section 2.1 of volume II will be required in the testing environment from June 23, 2026, and in the production environment from July 23, 2026. Participants that do not comply with new requirements established in section 5.1 of volume II have until July 8, 2026 to implement changes in the testing environment and until September 6, 2026 to implement changes in the production environment. Financial institutions and other system participants requiring clarification on volume I should contact the Central Bank's Information Technology Service Centre at telephone (61) 3414 2156 or email suporte.ti@bcb.gov.br. For questions regarding volume II, participants should contact the Pix Information Technology Service Centre at telephone (61) 3414 5100 or email suporte.pix@bcb.gov.br.