CERT@VDE has been an accredited member of Trusted Introducer since February 3, 2018.
CERTs around the world use Trusted Introducer to organize trust-based communication and collaboration. To become an accredited member from a listed team, a CERT must disclose information about its policies and processes to the other accredited members. It must undertake to comply with some de facto standards developed in the CERT community, e.g. the Information Sharing Traffic Light Protocol (TLP) , and the TI CSIRT Code of Practice (CCoP).
Update A, 6.3.2018
The corresponding press release is available here.