Question: What is needed to be allowed to climb staircase in the crown of the statue of liberty?
About the article "Statue of Liberty", section "Location and visiting".

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The Statue of Liberty is a colossal statue in New York harbor.
The Statue of Liberty may also refer to: "The Statue of Liberty" (film) "Statue of Liberty" (song) Statue of Liberty (Mytilene), Greece Liberty Statue (Budapest)  
Access and attributes.
Location and visiting.
The statue is situated in Upper New York Bay on Liberty Island, south of Ellis Island.
Both islands were ceded by New York to the federal government in 1800.
As agreed in an 1834 compact between New York and New Jersey that set the state border at the bay's midpoint, the original islands remain New York territory despite their location on the New Jersey side of the state line.
Land created by reclamation at Ellis is New Jersey territory.
No charge is made for entrance to Statue of Liberty National Monument, but there is a cost for the ferry service that all visitors must use, as private boats may not dock at the island.
A concession was granted in 2007 to Statue Cruises to operate the transportation and ticketing facilities, replacing Circle Line, which had operated the service since 1953.
The ferries, which depart from Liberty State Park in Jersey City and Battery Park in Lower Manhattan, also stop at Ellis Island when it is open to the public, making a combined trip possible.
All ferry riders are subject to security screening, similar to airport procedures, prior to boarding.
Visitors intending to enter the statue's base and pedestal must obtain a complimentary museum/pedestal ticket along with their ferry ticket.
Those wishing to climb the staircase within the statue to the crown purchase a special ticket, which may be reserved up to a year in advance.
A total of 240 people per day are permitted to ascend: ten per group, three groups per hour.
Climbers may bring only medication and cameras—lockers are provided for other items—and must undergo a second security screening.
The Statue of Liberty (Liberty Enlightening the World; French: "La Liberté éclairant le monde") is a colossal neoclassical sculpture on Liberty Island in the middle of New York Harbor, in Manhattan, New York City.
The statue, designed by Frédéric Auguste Bartholdi and dedicated on October 28, 1886, was a gift to the United States from the people of France.
The statue is of a robed female figure representing Libertas, the Roman goddess of freedom, who bears a torch and a "tabula ansata" (a tablet evoking the law) upon which is inscribed the date of the American Declaration of Independence, July 4, 1776.
A broken chain lies at her feet.
The statue is an icon of freedom and of the United States: a welcoming signal to immigrants arriving from abroad.
Bartholdi was inspired by French law professor and politician Édouard René de Laboulaye, who is said to have commented in 1865 that any monument raised to American independence would properly be a joint project of the French and American peoples.
Due to the troubled political situation in France, work on the statue did not commence until the early 1870s.
In 1875, Laboulaye proposed that the French finance the statue and the Americans provide the site and build the pedestal.
Bartholdi completed the head and the torch-bearing arm before the statue was fully designed, and these pieces were exhibited for publicity at international expositions.
The torch-bearing arm was displayed at the Centennial Exposition in Philadelphia, in 1876, and in New York's Madison Square Park from 1876 to 1882.
Fundraising proved difficult, especially for the Americans, and by 1885 work on the pedestal was threatened due to lack of funds.
Publisher Joseph Pulitzer of the "New York World" started a drive for donations to complete the project that attracted more than 120,000 contributors, most of whom gave less than a dollar.
The statue was constructed in France, shipped overseas in crates, and assembled on the completed pedestal on what was then called Bedloe's Island.
The statue's completion was marked by New York's first ticker-tape parade and a dedication ceremony presided over by President Grover Cleveland.
The statue was administered by the United States Lighthouse Board until 1901 and then by the Department of War; since 1933 it has been maintained by the National Park Service.
The statue was closed for renovation for much of 1938.
In the early 1980s, it was found to have deteriorated to such an extent that a major restoration was required.
While the statue was closed from 1984 to 1986, the torch and a large part of the internal structure were replaced.
After the September 11 attacks in 2001, it was closed for reasons of safety and security; the pedestal reopened in 2004 and the statue in 2009, with limits on the number of visitors allowed to ascend to the crown.
The statue, including the pedestal and base, was closed for a year until October 28, 2012, so that a secondary staircase and other safety features could be installed; Liberty Island remained open.
However, one day after the reopening, Liberty Island closed due to the effects of Hurricane Sandy; the statue and island opened again on July 4, 2013.
Public access to the balcony surrounding the torch has been barred for safety reasons since 1916. 
Celebrating the Statue of Liberty centennial 
The Hermann Heights Monument is a statue erected in New Ulm, Minnesota.
The statue depicts Hermann the Cheruscan, also known by the Latin name Arminius, but locals refer to the statue as Hermann the German.
The only National Register of Historic Places property of its kind in Minnesota, the monument remains an impressive remembrance of German ancestry for many Minnesotans.
Visitors to the statue can climb the spiral staircase to an observation platform at the base of the statue, which commands a view of the town and the Minnesota River Valley below.