Question: How do umpires switch positions in Cricket?
About the article "Cricket", section "Overs".

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The South Australian Cricket Umpires and Scorers Association ("SACUSA") is a group representing cricket umpires and scorers in the state of South Australia.  
Rain does not stop play in Armchair Cricket, nor will umpires offer the batting team bad light! 
The umpires rotated positions clockwise in the middle of the fifth inning, with Klem moving behind the plate. 
The ICC appoints international umpires and Match referees who officiate at all sanctioned Test matches, One-Day Internationals and Twenty20 Internationals.
The ICC operates 3 panels of umpires: namely the Elite Panel, the International Panel, and the Associates and Affiliates Panel.
As of April 2012, the Elite Panel includes twelve umpires.
In theory, two umpires from the Elite Panel officiate at every Test match, whilst one Elite Panel umpire stands in ODI matches together with an umpire from the International Panel.
In practice, members of the International Panel stand in occasional Test matches, as this is viewed as a good opportunity to see whether they can cope at the Test level, and whether they should be elevated to the Elite Panel.
The Elite Panel are full-time employees of the ICC, although do still, very occasionally umpire first-class cricket in their country of residence.
The average, annual, officiating schedule for Elite Umpires is 8-10 Test matches and 10-15 ODIs, a potential on-field workload of 75 days plus travel and preparation time per year.
The International Panel is made up of officials nominated from each of the ten Test-playing cricket boards.
The Panel Members officiate in ODI matches in their home country, and assist the Elite Panel at peak times in the cricket calendar when they can be appointed to overseas ODI and Test matches.
International Panel members also undertake overseas umpiring assignments such as the ICC Under 19 Cricket World Cup in order to improve their knowledge and understanding of overseas conditions, and help them prepare for possible promotion onto the Elite Panel.
Some of these umpires also officiates in the Cricket World Cup.
Each of the Test cricket boards nominates a "third umpire" who can be called upon to review certain on-field decisions through instant television replays.
All third umpires are first-class umpires in their own county, and the role is seen as a step onto the International Panel, and then the Elite Panel.
The inaugural ICC Associate and Affiliate International Umpires Panel was formed in June 2006.
It superseded the ICC Associate and Affiliate International Umpires Panel, created in 2005, and serves as the pinnacle for umpires from non-Test playing Members, with selection achieved through each of the five ICC Development Program Regional Umpires Panels.
Members of the Associate and Affiliate International Umpires Panel are eligible for appointments to ODIs involving ICC Associate Members, ICC Intercontinental Cup matches and other Associate and Affiliate tournaments.
High-performing umpires may also be considered for other ICC events, including the ICC U/19 Cricket World Cup, and could also be invited to be involved in the ICC Champions Trophy and ICC Cricket World Cup.
There is also an Elite Panel of ICC Referees who act as the independent representative of the ICC at all Test and ODI matches.
As of January 2009, it has 6 members, all highly experienced former international cricketers.
The Referees do not have the power to report players or officials (which has to be done by the umpires), but they are responsible for conducting hearings under the ICC Code of Conduct and imposing penalties as required at matches, ranging from an official reprimand to a lifetime ban from cricket.
Decisions can be appealed, but the original decision is upheld in most cases.
The Council failed to achieve consensus among the cricket playing nations as of June 2012, on application of Umpire's Decision Review System universally due to opposition by BCCI .
It will continue to be applied subject to mutual agreement of the playing countries.
In July 2012, ICC decided to send a delegation to show the ball tracking research done by Dr Ed Rosten, an expert on computer vision and technology, to BCCI to remove the scepticism about the use of DRS technology. 
Kulkarni made his debut in both List A and first-class cricket in 2009.
He is member of the International Cricket Council's International Panel of Umpires and Referees.