Delaying and Obstructive Tactics
Senators had several ways in which they could influence (or frustrate) a presiding magistrate. When a presiding magistrate was proposing a motion, for example, the senators could call "consult" (consule), which required the magistrate to ask for the opinions of the senators. Any senator could demand a quorum call (with the cry of numera), which required a count of the senators present. Like modern quorum calls, this was usually a delaying tactic. Senators could also demand that a motion be divided into smaller motions. Acts such as applause, booing, or heckling often played a major role in a debate, and, in part because all senators had an absolute right to free speech, any senator could respond at any point if he was attacked personally. Once debates were underway, they were usually difficult for the presiding magistrate to control. The presiding magistrate typically only regained some control once the debating had ended, and a vote was about to be taken.
In the later years of the Republic, attempts were made by the aristocracy to limit the increasing level of chaos associated with the obstructive tendencies and democratic impulses of some of the senators. Laws were enacted to prevent the inclusion of extraneous material in bills before the Senate. Other laws were enacted to outlaw the so-called omnibus bills, which are bills, usually enacted by a single vote, that contain a large volume of often unrelated material.
Laws were also enacted to strengthen the requirement that three days pass between the proposal of a bill, and the vote on that bill. During his term as dictator, Julius Caesar enacted laws that required the publication of Senate resolutions. This publication, called the acta diurna, or "daily proceedings", was meant to increase transparency and minimize the potential for abuse. This publication was posted in the Roman Forum, and then sent by messengers throughout the provinces.
Read more about this topic: Senate Of The Roman Republic