A look at the immigration overhaul bill now before the Senate:

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BORDER SECURITY

_The bill makes it a goal that there be 100 percent surveillance of the border with Mexico and that 90 percent of would-be crossers are caught or turned back.

_Within six months of enactment of the bill, the Homeland Security Department must develop a border security plan to achieve those goals, including the use of drones, additional agents and other approaches; and develop a plan to identify where more fencing is needed.

_If the goals of a 90 percent effectiveness rate and continuous surveillance on the border are not met within five years, a Southern Border Security Commission would be established with border-state governors and others to determine how to achieve them.

_Before anyone in the U.S. illegally can get a new provisional legal status, the border security and border fencing plans must be in place. Before they can get permanent resident green cards, the plans must be substantially completed, and a new entry-exit system must also be implemented at U.S. seaports and airports to track people coming and going. A mandatory system for employers to check workers' legal status must also be in place.

_About 3,500 new Customs agents would be hired.

_The National Guard would be deployed to the border to build fencing and checkpoints and perform other tasks.

_Funding would be provided to increase border-crossing prosecutions and to create more border patrol stations and forward operating bases.

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PATH TO CITIZENSHIP

_The estimated 11 million people living in the U.S. illegally could obtain "registered provisional immigrant status" six months after enactment of the bill as long as:

(1) The Homeland Security Department has developed border security and fencing plans.

(2) They arrived in the U.S. prior to Dec. 31, 2011, and maintained continuous physical presence since then.

(3) They do not have a felony conviction or three or more misdemeanors.

(4) They pay a $500 fine.

_People in provisional legal status could work and travel in the U.S. but would not be eligible for most federal benefits, including health care and welfare.

_The provisional legal status lasts six years and is renewable for another $500.

_People deported for noncriminal reasons can apply to re-enter in provisional status if they have a spouse or child who is a U.S. citizen or permanent resident, or if they had been brought to the U.S. as a child.

_After 10 years in provisional status, immigrants can seek a green card and lawful permanent resident status if they are current on their taxes and pay a $1,000 fine, have maintained continuous physical presence in the U.S., meet work requirements and learn English. Also the border triggers must have been met, and all people waiting to immigrate through the legal system as of the date of enactment of the legislation must have been dealt with.

_People brought to the country as youths would be able to get green cards in five years, and citizenship immediately thereafter.

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HIGH-SKILLED WORKERS

_The cap on the H-1B visa program for high-skilled workers would be immediately raised from 65,000 a year to 110,000 a year, with 25,000 more set aside for people with advanced degrees in science, technology, engineering or math from a U.S. school. The cap could go as high as 180,000 a year depending on demand.

_New protections would crack down on companies that use H-1B visas to train workers in the U.S. only to ship them back overseas.

_Immigrants with certain extraordinary abilities, such as professors and researchers, multinational executives and athletes, would be exempted from green-card limits. So would graduates of U.S. universities with job offers and degrees in science, technology, engineering or math.

_A startup visa would be made available to foreign entrepreneurs seeking to come to the U.S. to start a company.

_A new merit visa, for a maximum of 250,000 people a year, would award points to prospective immigrants based on their education, employment, length of residence in the U.S. and other considerations. Those with the most points would earn the visas.

_The bill would eliminate the government's Diversity Visa Lottery Program, which randomly awards 55,000 visas to immigrants from countries with historically low rates of immigration to the United States, so that more visas can be awarded for employment and merit ties.

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LOW-SKILLED WORKERS

_A new W visa would allow up to 200,000 low-skilled workers a year into the country for jobs in construction, long-term care, hospitality and other industries.

_A new agriculture worker visa program would be established to replace the existing program. Agriculture workers already here illegally, who've worked in the industry at least two years, could qualify in another five years for green cards if they stay in the industry.

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FAMILY IMMIGRATION

_Under current law, U.S. citizens can sponsor spouses, children and siblings to come to the U.S., with limits on some categories. The bill would bar citizens from sponsoring their siblings and would allow them to sponsor married sons and daughters only if those children are under age 31.

_Legal permanent residents can currently sponsor spouses and children, but the numbers are limited. The bill eliminates that limit.

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EMPLOYMENT VERIFICATION

_Within four years, all employers must implement E-Verify, a program to electronically verify their workers' legal status. As part of that, noncitizens would be required to show photo ID that must match with a photo in the E-Verify system.