Organisation and administration
In order to carry out its service programs, Rotary is structured in club, district and international levels. Rotarians are members of their clubs. The clubs are chartered by the global organization Rotary International (RI) headquartered in Evanston, a suburban city near Chicago, Illinois. For administrative purposes, the more than 32,000 clubs worldwide are grouped into 529 districts, and the districts into 34 zones.
Club
The Rotary Club is the basic unit of Rotary activity, and each club determines its own membership. Clubs originally were limited to a single club per city, municipality, or town, but Rotary International has encouraged the formation of one or more additional clubs in the largest cities when practical. Each club meets weekly, usually at a mealtime on a weekday in a regular location, when Rotarians can discuss club business and hear from guest speakers. Each club also conducts various service projects within its local community, and participates in special projects involving other clubs in the local district, and occasionally a special project in a "sister club" in another nation. Most clubs also hold social events at least quarterly and in some cases more often.
Each club elects its own president and officers among its active members for a one year term. The clubs enjoy considerable autonomy within the framework of the standard constitution and the constitution and bylaws of Rotary International. The governing body of the club is the board of directors, consisting of the club president (who serves as the board chairman), a president-elect, club secretary, club treasurer, and several club board directors. In the majority of clubs, the immediate past president is also a member of the board. The president usually appoints the directors to serve as chairs of the major club committees, including those responsible for club service, vocational service, community service, youth service, and international service.
District level
A district governor, who is an officer of Rotary International and represents the RI board of directors in the field, leads his/her respective Rotary district. Each governor is nominated by the clubs of his/her district, and elected by all the clubs meeting in the annual RI Convention held in a different country each year. The district governor appoints assistant governors from among the Rotarians of the district to assist in the management of Rotary activity and multi-club projects in the district.
Zone level
Approximately 15 Rotary districts form a zone. A zone director, who serves as a member of the RI board of directors, heads two zones. The zone director is nominated by the clubs in the zone and elected by the convention for the terms of two consecutive years.
Rotary International

Rotary International Headquarters in Evanston, Illinois, USA.
Rotary International is governed by a board of directors composed of the international president, the president-elect, the general secretary, and 17 zone directors. The nomination and the election of each president is handled in the one-to-three year period before he takes office, and is based on requirements including geographical balance among Rotary zones and previous service as a district governor and board member. The international board meets quarterly to establish policies and make recommendations to the overall governing bodies, the RI Convention and the RI Council on Legislation.
The chief operating officer of RI is the general secretary, who heads a staff of about 600 people working at the international headquarters in Evanston and in seven international offices around the world.
Membership
According to its constitutions ("Charters"), Rotary defines itself as a non-partisan, non-sectarian and secular organization. It is open to business and professional leaders of all ages (18 and upwards) and economic status.
One can contact a Rotary club to inquire about membership but can join a rotary club only if invited; there is no provision to join without an invitation as each prospective Rotarian requires a sponsor who is an existing Rotarian.  Some clubs, though not all, have exclusivist membership criteria: reputation and business or professional leadership may be a specific evaluation criterion for issuing invitations to join, and representation from a specific profession or business may be limited to a percentage of a specific club's membership.
Active membership
Active membership is by invitation from a current Rotarian, to professionals or businesspersons working in diverse areas of endeavor. Each club may limit up to ten per cent of its membership representing each business or profession in the area it serves. The goal of the clubs is to promote service to the community they work in, as well as to the wider world. Many projects are organized for the local community by a single club, but some are organized globally.
Honorary membership
Honorary membership is given by election of a Rotary Club to people who have distinguished themselves by meritorious service in the furtherance of Rotary ideals. Honorary membership is conferred only in exceptional cases. Honorary members are exempt from the payment of admission fees and dues. They have no voting privileges and are not eligible to hold any office in their club. Honorary membership is time limited and terminates automatically at the end of the term, usually one year. It may be extended for an additional period or may also be revoked at any time. Examples of honorary members are heads of state or former heads of state, famous scientists  or other famous people.
Female membership
From 1905 until the 1980s, women were not allowed membership in Rotary clubs, although Rotarian spouses, including Paul Harris' wife, were often members of the similar "Inner Wheel" club. Women did play some roles, and Paul Harris' wife made numerous speeches. In 1963, it was noted that the Rotary practice of involving wives in club activities had helped to break down female seclusion in some countries.  Clubs such as Rotary had long been predated by women's voluntary organizations, which started in the United States as early as 1790.  The first Irish clubs discussed admitting women as members in 1912, but the proposal floundered over issues of social class. Gender equity in Rotary moved beyond the theoretical question when in 1976, the Rotary Club of Duarte in Duarte, California admitted three women as members. After this club refused to remove the women from membership, in 1978 Rotary International revoked the club's charter. The Duarte club filed suit in the California courts, claiming that Rotary Clubs are business establishments subject to regulation under California's Unruh Civil Rights Act, which bans discrimination based on race, gender, religion or ethnic origin. Rotary International then appealed the decision to the U.S. Supreme Court. The RI attorney argued that "... [the decision] threatens to force us to take in everyone, like a motel". The Duarte Club was not alone in opposing RI leadership; the Seattle-International District club unanimously voted to admit women in 1986.  The United States Supreme Court, on May 4, 1987, confirmed the Californian decision. Rotary International then removed the gender requirements from its requirements for club charters, and most clubs in most countries have opted to include women as members of Rotary Clubs.  The first female club president to be  
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The Rotary Club of Howick Inc.