More often than not, Senate leaders—as agents of their party responsible for defending the political, policy, and procedural interests of their colleagues—honor a hold request because not doing so could trigger a range of parliamentary responses from the holding Senator(s), such as a filibuster, that could expend significant amounts of scarce floor time. Types of Holds

Holds can be used to accomplish a variety of purposes. Until recently, many holds were considered a nonymous (or secret ) because the source and contents of the request were not made available to the public, or even to other Senators. Recent Efforts to Regulate Holds

Written hold requests emerged as an informal practice in the late 1950s under the majority leadership of Lyndon B. Johnson as a way for Senators to make routine requests of their leaders regarding the Senate's schedule. The Senate has considered a variety of proposals targeting the Senate hold in recent years, two of which the chamber adopted. Prior to these rules changes, hold letters were written with the expectation that they would be treated as private correspondences between a Senator and his or her party leader. 110-81

The first proposal, enacted in 2007 as Section 512 of the Honest Leadership and Open Government Act ( P.L. 110-81 ), established new reporting requirements that were designed to take effect if either the majority or minority leader or their designees, acting on behalf of a party colleague on the basis of a hold letter previously received, objected to a unanimous consent request to advance a measure or matter to the Senate floor for consideration or passage. If objection was raised on the basis of a hold letter, then the Senator who originated the hold was expected to submit a "notice of intent to object" to his or her party leader and, within six days of session thereafter, deliver the objection notice to the Legislative Clerk for publication in both the Congressional Record and the Senate's Calendar of Business (or, if the hold pertained to a nomination, the Executive Calendar ). To accommodate the publication of these notices, a new "Notice of Intent to Object to Proceeding" section was added to both Senate calendars as shown in Appendix B . Many holds lodged during the 110 th and 111 th Congresses (2007-2010) are likely to have fallen outside the purview of Section 512 regulation. 28 ) that extends notification requirements to a larger share of hold activity. Instead of a six day reporting window, S.Res. 28 provides two days of session during which Senators are expected to deliver their objection notices for publication. The action that triggers the reporting requirement also changed: from an objection on the basis of a colleague's hold request (under Section 512) to the initial transmission of a written objection notice to the party leader (under S.Res. 28 ). In the event that a Senator neglects to deliver an objection notice for publication within two session days and a party leader nevertheless raises objection on the basis of that hold, S.Res. 28 requires that the name of the objecting party leader be identified as the source of the hold in the "Notice of Intent to Object" section of the appropriate Senate calendar. Challenges Inherent in Regulating Hold Activity

Senate holds are predicated on the unanimous consent nature of Senate decision-making. The influence they exert in chamber deliberations is based primarily upon the significant parliamentary prerogatives individual Senators are afforded in the rules, procedures, and precedents of the chamber. As such, efforts to regulate holds are inextricably linked with the chamber's use of unanimous consent agreements to structure the process of calling up measures and matters for floor debate and amendment.
The Senate "hold" is an informal practice whereby Senators communicate to Senate leaders, often in the form of a letter, their policy views and scheduling preferences regarding measures and matters available for floor consideration. Unique to the upper chamber, holds can be understood as information-sharing devices predicated on the unanimous consent nature of Senate decision-making. Senators place holds to accomplish a variety of purposes—to receive notification of upcoming legislative proceedings, for instance, or to express objections to a particular proposal or executive nomination—but ultimately the decision to honor a hold request, and for how long, rests with the majority leader. Scheduling Senate business is the fundamental prerogative of the majority leader, and this responsibility is typically carried out in consultation with the minority leader.
The influence that holds exert in chamber deliberations is based primarily upon the significant parliamentary prerogatives individual Senators are afforded in the rules, procedures, and precedents of the chamber. More often than not, Senate leaders honor a hold request because not doing so could trigger a range of parliamentary responses from the holding Senator(s), such as a filibuster, that could expend significant amounts of scarce floor time. As such, efforts to regulate holds are inextricably linked with the chamber's use of unanimous consent agreements to structure the process of calling up measures and matters for floor debate and amendment.
In recent years the Senate has considered a variety of proposals that address the Senate hold, two of which the chamber adopted. Both sought to eliminate the secrecy of holds. Prior to these rules changes, hold letters were written with the expectation that their source and contents would remain private, even to other Senators.
In 2007, the Senate adopted new procedures to make hold requests public in certain circumstances. Under Section 512 of the Honest Leadership and Open Government Act (P.L. 110-81), if objection was raised to a unanimous consent request to proceed to or pass a measure or matter on behalf of another Senator, then the Senator who originated the hold was expected to deliver for publication in the Congressional Record, within six session days of the objection, a "notice of intent to object" identifying the Senator as the source of the hold and the measure or matter to which it pertained. A process for removing a hold was also created, and a new "Notice of Intent to Object" section was added to both Senate calendars to take account of objection notices that remained outstanding.
An examination of objection notices published since 2007 suggests that many hold requests are likely to have fallen outside the scope of Section 512 regulation. In an effort to make public a greater share of hold requests, the Senate adjusted its notification requirements by way of a standing order (S.Res. 28) adopted at the outset of the 112th Congress (2011-2012). Instead of the six session day reporting window specified in Section 512, S.Res. 28 provides two days of session during which Senators are expected to deliver their objection notices for publication. The action that triggers the reporting requirement also shifted: from an objection on the basis of a colleague's hold request (under Section 512) to the initial transmission of a written objection notice to the party leader (under S.Res. 28). In the event that a Senator neglects to deliver an objection notice for publication and a party leader nevertheless raises objection on the basis of that hold, S.Res. 28 requires that the name of the objecting party leader be identified as the source of the hold in the "Notice of Intent to Object" section of the appropriate Senate calendar.