Reciprocity is one of the high-level principles that govern the relationship between the FATF and the FSRBs.
It means that both the FATF and the FSRBs should respect and acknowledge each other's work, such as standard setting, mutual evaluations, and follow-up processes. Reciprocity also implies that the FATF and the FSRBs should have similar mechanisms or practices for ensuring effective participation of their members in their activities.
References: = The main reference for this question is the document titled "High-Level Principles and Objectives for FATF and FATF-style regional bodies" published by the FATF in February 2019. You can access it by clicking here. You can also find more information about the FSRBs and their roles on the FATF website and the Sygna blog.
Reference:https://www.fatf-gafi.org/media/fatf/documents/High-Level%20Principles%20and%20Objectives%20 (4)