Omnibus appropriations acts have become a significant feature of the legislative process in recent years as Congress and the President have resorted more frequently to their use to bring action on the regular appropriations cycle to a close. Following a discussion of pertinent background information, this report reviews the recent use of such measures and briefly addresses several issues that their use raises. Each year, Congress and the President may enact discretionary spending in the form of regular appropriations acts, as well as continuing and supplemental appropriations acts. The number of regular appropriations bills had been fixed at 13 for several decades, but a realignment of the House and Senate Appropriations subcommittees at the beginning of the 109 th Congress reduced the number of regular appropriations bills normally considered each year to 11 (starting with the FY2006 cycle). The number of regular appropriations bills was increased to 12 at the beginning of the 110 th Congress (starting with the FY2008 cycle) due to further subcommittee realignment and has remained at that level through the date of this report. If action is not completed on all of the regular appropriations acts toward the end of a congressional session, Congress will sometimes combine the unfinished regular appropriations into an omnibus measure. In some instances, action on the unfinished acts carries over into the following session. An omnibus act may set forth the full text of each of the regular appropriations acts included therein, or it may enact them individually by cross-reference. The House and Senate consider annual appropriations acts (and other budgetary legislation) within constraints established in a yearly budget resolution required by the Congressional Budget Act of 1974, as amended. Budget resolution policies are enforced by points of order that may be raised during House and Senate consideration of spending, revenue, and debt limit legislation. On occasion, budget policies may be modified by agreements reached between congressional leaders and the President; such modifications may be accommodated during legislative action through the use of waivers of points of order, emergency spending designations, and other budgetary or procedural devices. Discretionary spending has also been subject to statutory limits. These were first implemented between FY1991 and FY2002 by the Budget Enforcement Act (BEA) of 1990, as amended. Under this statutory mechanism, separate discretionary spending limits were applied to two different measurements of spending: budget authority and outlays. The discretionary spending limits were enforced by the sequestration process, which involved automatic, largely across-the-board reductions in discretionary spending in order to eliminate any breach of the limits. Pursuant to the Budget Control Act of 2011 ( P.L. 112-25 ), discretionary budget authority for FY2012-FY2021, with some exceptions, is again subject to statutory spending limits on defense and non-defense spending. For nearly two centuries, regular appropriations bills were considered by the House and Senate as individual measures and enacted by the President as standalone laws. In 1950, the House and Senate undertook a one-time experiment in improving legislative efficiency by considering all of the regular appropriations acts for FY1951 in a single bill, the Omnibus Appropriations Act of 1950 (81 st Congress, P.L. 759, September 6, 1950). The following year, the House and Senate returned to the practice of considering the regular appropriations acts individually. Over the past few decades, however, the House and Senate on several occasions have combined multiple regular appropriations acts into "consolidated" appropriations measures, sometimes enacting individual bills by cross-reference. Beginning in the late 1970s, certain omnibus acts have also sometimes been titled by Congress as "continuing appropriations acts," despite the fact that these acts generally incorporate the texts of multiple regular appropriations acts for full-year funding or enact such texts by reference. This is in contrast to the usual form of continuing appropriations, which provides funding at a rate with anomalies. This report includes only the former type of "continuing appropriations act" in its account of omnibus appropriations acts. During the 31-year period covering FY1986-FY2016, 22 different omnibus measures were enacted for 19 different fiscal years. (Two separate omnibus appropriations acts were enacted for FY2001, FY2009, and FY2012. ) The 22 omnibus appropriations acts covered a total of 170 regular appropriations acts. Each of the omnibus acts funded between two and 13 regular appropriations acts, on average funding almost eight (7.7) of them. Eighteen of the omnibus measures were bills or joint resolutions carrying the designation "omnibus," "consolidated," or "omnibus consolidated" appropriations in the title; seven were titled as continuing appropriations acts (FY1986, FY1987, FY1988, the first ones for FY2009 and FY2012, FY2013; and FY2015); and one was the VA-HUD Appropriations Act for FY2001, which also included the Energy and Water Development Appropriations Act for FY2001 (see Table 1 , and, at the end of the report, Table 3 ). During this period, a total of 390 regular appropriations acts were enacted or covered by full-year continuing appropriations. Of these, 191 (48.9%) were enacted as standalone measures, 158 (43.6%) were enacted in omnibus measures, and 29 (6.9%) were enacted in other forms (largely full-year continuing appropriations acts). Each year, a median of six regular appropriations acts were enacted as standalone measures, and 5.5 were enacted in omnibus measures. Sixty-five (16.7%) of the 390 regular appropriations acts were enacted on or before October 1, the start of the fiscal year. Nine of these bills were included in omnibus measures (six in FY1997 and three in FY2009), and the rest were enacted as standalone measures. On average, about two (2.1) regular appropriations bills per year were enacted before the start of the fiscal year during this period. Ten of the 18 omnibus appropriations acts bearing the designation "omnibus," "consolidated," or "omnibus consolidated" in their title originated in the House as a regular appropriations bill and were expanded in coverage (and their titles redesignated) at the stage of resolving House-Senate differences. These included the appropriations acts for Defense ( H.R. 3610 ) in FY1997; Transportation ( H.R. 4328 ) in FY1999; District of Columbia ( H.R. 3194 ) in FY2000; Labor-HHS-Education ( H.R. 4577 ) in FY2001; Agriculture ( H.R. 2673 ) in FY2004; Foreign Operations ( H.R. 4818 ) in FY2005; State-Foreign Operations ( H.R. 2764 ) in FY2008; Transportation, Housing and Urban Development ( H.R. 3288 ) in FY2010; Agriculture ( H.R. 2112 ) and Military Construction-VA ( H.R. 2055 ) in FY2012 and Military Construction-VA ( H.R. 2029 ) in FY2016. In the case of the FY1997, FY1999, FY2000, FY2001, FY2004, FY2005, FY2010, and the second FY2012 omnibus appropriations acts, the transformation from a regular appropriations bill into a consolidated appropriations measure occurred as part of the conference proceedings between the House and Senate. For the first FY2012 omnibus, the additional appropriations acts were added as a Senate floor amendment to a House-passed regular appropriations bill before conference occurred. For FY2008, conference procedures were not used and the transformation occurred in connection with an exchange of amendments between the two chambers. The acts for FY2000 and FY2001 enacted regular appropriations measures by cross-reference instead of including their full text (except for FY2000 appropriations for the District of Columbia). None of the other seven omnibus appropriations acts bearing such designations involved the transformation of a regular appropriations act. Four of the acts (one for FY1996, two for FY2009, and one for FY2013) originated as omnibus measures and retained this status throughout consideration. In FY2003, the omnibus measure originated in the House as a simple continuing resolution ( H.J.Res. 2 ) but was expanded in coverage and redesignated during Senate floor action. Most recently, the vehicles for the FY2014 and FY2015 omnibus acts were originally non-appropriations measures ( H.R. 3547 and H.R. 83 , respectively) that were amended to include omnibus appropriations. Several issues pertaining to the use of omnibus appropriations have been the focus of debate in recent years. These issues include the extent to which regular appropriations that are enacted in omnibus measures have been passed by the House and Senate prior to final congressional action, the use of across-the-board rescissions, and the inclusion of legislative provisions. One of the chief concerns regarding the use of omnibus appropriations acts is that it reduces the opportunities for Members to debate and amend the regular appropriations acts that are incorporated therein. This concern may be lessened if the regular appropriations acts incorporated into omnibus measures have been previously passed by the House and Senate before action on a final version. During the FY1986-FY2016 period, the House was more likely than the Senate to have passed the regular appropriations on initial consideration that were eventually incorporated into omnibus acts, with the House passing 116 out of the 170 regular appropriations bills, while the Senate passed 72 (see Table 2 ). For both the House and the Senate, between FY1986 and FY2001, the majority of appropriations acts that were ultimately included in omnibus measures were previously passed by the House and Senate each fiscal year. However, during certain fiscal years between FY2003 and FY2016, one or both chambers passed fewer than half of the regular appropriations bills that were ultimately enacted in omnibus form.