be elected from any district which contains a part of the district in which they resided at the time of the redistricting and reelected if a resident of the new district they represents for 18 months prior to reelection. Restrictions Members of the General Assembly may not hold other public offices or receive appointments by the governor, and their salaries may not be increased during their tenure. Vacancies Seats in the General Assembly may become vacant due to a member resigning, dying, being expelled, or being appointed to another office. Under the Illinois Constitution, when a vacancy occurs, it must be filled by appointment within 30 days. If a Senate seat becomes vacant more than 28 months before the next general election for that seat, an election is held at the next general election. The replacement member must be a member of the same party as the departing member. The General Assembly has enacted a statute governing this process. Under that statute, a replacement member is appointed by the party committee for that district, whose votes are weighted by the number of votes cast for that office in the area that each committee member represents. The appointment process was unsuccessfully challenged before the Illinois Supreme Court in 1988 as an unconstitutional grant of state power to political parties, but the challenge failed. Vetoes The governor can veto bills passed by the General Assembly in four different ways: a full veto, an amendatory veto, and, for appropriations only, an item veto and a reduction veto. These veto powers are unusually broad among US state governors. The line item veto was added to the Illinois Constitution in 1884. The amendatory and reduction vetoes were new additions in the 1970 Constitution. The General Assembly can override full, amendatory and item vetoes by a three-fifths majority vote in both chambers. It can override a reduction veto by a simple majority vote in both chambers. If both chambers agree to the changes the governor suggests in an amendatory veto, these changes can be approved by a simple majority vote in both chambers. If the General Assembly approves an amended law in response to the governor's changes, the bill becomes law once the governor certifies that the suggested changes have been made. Joint Committee on Administrative Rules By statute,the General Assembly has the power to block regulations, including emergency regulations, proposed by state administrative agencies. This