(CNN) - Hundreds of thousands of people who entered the United States as children but without documentation can apply -- beginning Wednesday -- to remain in and work in the country without fear of deportation for at least two years.
"I've found the form!" screamed Maria, a young Chilean at a Latino community center in New York, as she leaped from her seat.
She was with a number of other undocumented immigrants meeting here to get legal advice in anticipation of the release of the form, which authorities surprisingly posted a day before they had said they would.
The form, titled "Consideration of Deferred Action for Childhood Arrivals," was dated August 15, 2012 and bore the expiration date of February 28, 2013.
Maria started filling it out immediately, telling a reporter she was too afraid to divulge her last name or details of her childhood trek to the United States, but would feel differently once the form had been processed and her status ensured.
The director of U.S. Citizenship and Immigration Services (USCIS) said Tuesday that applicants who have not committed major crimes can apply without fear of deportation.
"This afternoon, USCIS makes available online the forms and instructions for individuals who will request deferred action for childhood arrivals," Director Alejandro Mayorkas said in a conference call.
The announcement comes two months after Homeland Security Secretary Janet Napolitano said that people who arrived in the United States as children may request consideration of deferred action for a period of two years subject to renewal, and would then be eligible for work authorization.
The program, dubbed Consideration of Deferred Action for Childhood Arrivals, was created in June under an executive order signed by President Barack Obama.
When he signed the order, Obama said the changes will make immigration policy "more fair, more efficient and more just."
The shift on the politically volatile issue of immigration policy elicited praise from Latino leaders, while Republicans reacted with outrage, saying the move amounts to amnesty -- a negative buzzword among conservatives -- and usurps congressional authority.
"This is not amnesty," Obama said. "This is not immunity. This is not a path to citizenship. It's not a permanent fix. This is a temporary stopgap measure."
Mayorkas reiterated Tuesday that deferred action does not provide lawful status or a shortcut to permanent residency or citizenship.
The $465 application fee will fund the administrative costs of the program, including a biometric check and the issuance of a secure work-authorization document, he said.
Each request will be examined for possible fraud, he added.
The forms and instructions are posted at www.uscis.gov/childhoodarrivals.
In a suburb north of Atlanta, David and Daniel Hernandez listened carefully as their lawyer detailed the program.
They arrived in the United States on tourist visas some 15 years ago, when David was 3 years old and Daniel was 1.
Their mother, Salima Hernandez, said they wanted a better future and education for her kids. She said she didn't worry about their legal status until she learned that they would not be able to continue their education without a government ID or Social Security number.
David, now a senior in high school, and Daniel, a freshman, say they were not aware of their status until a couple of years ago, when they began to make plans for college.
"I felt that after high school I didn't have anywhere to go," Davis told CNN. "I felt that if it was not something coming up soon I would end up back in Mexico."
He said he remains concerned about revealing his status to federal authorities by filling out the application, but says it's worth any risk. "Whatever comes in the future is better than three months ago," he said.
"None of these kids are cutting in the line," said their lawyer, Charles Kuck. "They are getting two things out of this program: one, a promise they wont be deported for two years and, two, a work permit. In exchange, the federal government is getting a million or more kids coming forward, give their biographical information and that of their whole family and give their pictures."
He urged anyone applying to do so with the help of a lawyer. "The government has said quite clearly: there will be no appeals, there will be no motions to re-open. You get one bite at this apple."
As many as 1.7 million youths may qualify for the program, according to the Pew Hispanic Center, a project of the Pew Research Center.
In announcing the program, Obama noted that children of illegal immigrants "study in our schools, play in our neighborhoods, befriend our kids, pledge allegiance to our flag. It makes no sense to expel talented young people who are, for all intents and purposes, Americans."
The president declared that the policy change is "the right thing to do."
Under the new policy, people younger than 30 who arrived in the United States before the age of 16, pose no criminal or security
threat, and were successful students or served in the military, can get a two-year deferral from deportation and apply for work permits.
Participants must prove they have been living in the country continuously for at least five years.
The change is part of a department effort to target resources at illegal immigrants who pose a greater threat, such as criminals and those trying to enter the country now, Napolitano said.
The move addresses a concern of the Latino community and includes some of the provisions of a Democratic proposal called the DREAM Act that failed to win enough Republican support to gain congressional approval.
Obama has been criticized by Latino leaders for an overall increase in deportations of undocumented immigrants in recent years. Last year, U.S. Immigration and Customs Enforcement removed 396,906 illegal immigrants, the largest number in the agency's history.
Obama and Napolitano have called for Congress to pass the DREAM Act, which would put into law similar steps for children of illegal immigrants to continue living and working in the country.
Republicans who blocked Democratic efforts to change immigration laws have condemned the move, with some calling it an improper maneuver to skirt congressional opposition.
Rep. Steve King of Iowa, a GOP foe of Democratic proposals on immigration, threatened in June to sue to stop Obama "from implementing his unconstitutional and unlawful policy."
Republican Sen. Lindsey Graham of South Carolina has called the decision "a classic Barack Obama move of choosing politics over leadership," while House Judiciary Committee Chairman Lamar Smith, R-Texas, has called the change a "decision to grant amnesty to potentially millions of illegal immigrants."
Others predicted the move will tighten an already poor job market for young Americans.
However, Democratic Sen. Dick Durbin of Illinois, who sponsored the DREAM Act, said it "will give these young immigrants their chance to come out of the shadows and be part of the only country they've ever called home."
Presumed GOP presidential candidate Mitt Romney said in June that the issue needs more substantive action than an executive order, which can be replaced by a subsequent president.
As president, Romney said, he would seek to provide "certainty and clarity for people who come into this country through no fault of their own by virtue of the actions of their parents."
Latinos make up the fastest-growing immigrant population in the country, and the Latino vote is considered a crucial bloc for the November presidential election.
A spokeswoman for a major Latino group, the National Council of La Raza, hailed the administration's move.
"In light of the congressional inaction on immigration reform, this is the right step for the administration to take at this time," NCLR spokeswoman Laura Vazquez said in June.