The main purpose of this article is to show the relevance of the legislative branch participation in formatting bills originating in the executive. It shows that a strong executive is not necessarily accompanied by a weak legislature. By analyzing the changes the legislative made to executive bills through substitute bills and amendments to the legislation, the study shows that the legislative branch actively participates in drafting policies. By such means, the legislative branch is responsible for nearly 40 percent of the content of the laws promulgated in Brazil. Even when the executive takes steps aiming at controlling the legislative agenda, such as provisional decrees or urgency requests, the rates of legislative change do not decrease. As a result, in spite of the president institutional resources to place its own bills on the agenda, the legislative branch do discuss, analyze and modify the proposals advanced by the executive. An active instead of a passive legislative power emerges from the data shown in this article. 102