That article is quite uninformed. There was no legal requirement either, it was a purely political decision, based on the advice of the Paul-Ehrlich-Institute (PEI).

The statistical anomality about the thrombosis cases was known before and not considered a reason to halt vaccination. Only when it became clear that these were CSVT combined with lowered platelet count (which is known to be caused by immune reaction), strongly suggesting a causal link, then the decision to halt vaccination was made, until the actual risk could be assessed.