From June 2017 on, German Institute for Structural Engineering online provides the draft of Model Regulation Technical Building Rules :

The draft of MVV TB is announced in order to give those affected the possibilty to adapt to the new legal situation.  wird angekündigt, um den Betroffenen die Möglichkeit zu geben, sich auf die neue Rechtslage einzustellen. Statements on this can be communcated to DIBt (vvtb-anhoerung@dibt.de) till July 1st, 2017. The temporay final hearing on MVV TB is about to take place end of July. Technical and legal changes are performed on a regular basis after consideration of committee of conference of Secratary of Housing and Urban development.

Go to draft of Model Regulation Technical Building Rules (German only)

Go to site of DIBt