As part of an update of Baseline set 2, published on 07 November 2018, updated version of the following document is available:

Eu.Doc.48  Interface specification SCI-RBC  v2.2 (1.A)
 
The document can be found at the usual location under Published Documents, replacing the superceded documents. 
 
If your organisation does not have yet registered access, please fill out the registration form.