Bank of Portugal Notice No. 8/2023 regulates the registration of subcontracting agreements within supervised institutions and mandates the specific format for communicating information regarding new or materially altered essential or important subcontracted functions. The notice applies to credit institutions, electronic money institutions, and payment institutions, requiring them to maintain accurate records and report changes to the central bank. It entered into force on December 19, 2023, pursuant to Decree-Law No. 298/92 and Decree-Law No. 91/2018.