The decision of the Diet of Speyer, August 27, 1526, which allowed every sovereign authority, pending the meeting of a council, to decide matters of faith for itself and its province, recognizing its accountability to God and the emperor, conceded, even though in limited terms, a canonical basis for the application of territorialism in favor of the Reformation.
The Diet of Speyer's ruling on August 27, 1526, allowed each sovereign authority to decide matters of faith independently within their province, acknowledging their responsibility to God and the emperor. This decision, even if partial, supported territorialism in favor of the Reformation.