The itio in partes ("going into parts") was a procedure of the Imperial Diet of the Holy Roman Empire between 1648 and 1806. In this procedure, the members of the diet divided into two bodies (corpora), the Corpus Evangelicorum (body of Evangelicals) and the Corpus Catholicorum (body of Catholics), irrespective of the colleges to which they otherwise belonged. That is, the Protestant (Evangelical)[a] members of the College of Electors, the College of Princes and the College of Cities gathered together separately from the Catholic members of the same. The two bodies then negotiated with each other, but debated and voted among themselves. A decision was reached only when both bodies agreed. The itio in partes could be invoked whenever there was a unanimous vote of one body. At first, it could only be invoked in matters affecting religion, but gradually this requirement was dropped.[1]
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