This chapter addresses administrative silence as regulated by the rules applicable to the eu own administration, notably the european commission and eu agencies, but also other institutions in an administrative role. The eu administrative law lacks a general codification on procedures, and therefore, sectoral legislation and internal commission guidelines play a crucial role. In order to present the heterogeneous and wide-ranging sectoral laws in a comprehensive and systematic way, five representative pillars are examined: (1) market regulation; (2) risk regulation; (3) funding of private or public entities; (4) responses to requests for access to documents; and (5) civil service law. On the basis of this categorization, it is demonstrated ...