This article is a regulatory and institutional study about the Presidency of the Senate and the House of Deputies under the Constitution of 1925. Tis article maintains that both Presidencies constituted constitutional offices whose holders exercised political authority impartially, despite the partisan origin of these positions. These circumstances configured them as an intermediate model of parliamentary Presidency in comparative terms. These Presidencies interested parliamentary leaders for instrumental reasons that had to do with their political career, but within a power structure that relied on political parties with parliamentary majority, resulting in an increase in the average parliamentary experience of those elected to these positions.