Hobby Lobby, a prominent arts and crafts chain, is leading an effort to claim religious exemption against the contraceptive mandate of the new health care law. AP Photo/Tony Gutierrez

The Supreme Court will consider an appeal regarding companies' objections to President Barack Obama’s health care law, which has a birth-control mandate that some claimants say violates religious rights. The case could have widespread ramifications on corporations’ rights.

The Obama administration is defending a provision that requires most employers that offer their workers health insurance to provide a range of preventive health benefits, including contraception. A number of companies have sued, arguing that they should not be forced to cover some or all forms of birth control because doing so would violate their religious beliefs.

Both sides want the justices to settle an issue that has divided lower courts. The high court could announce its decision on whether to take up the topic as early as Tuesday, following a closed-door meeting.

At least four justices must vote Tuesday to hear the case in order for it to be taken up, at which point oral arguments would likely take place in late March – with a decision likely in late June.

The key issue is whether profit-making corporations can assert religious beliefs under the 1993 Religious Freedom Restoration Act. Nearly four years ago, the justices expanded the concept of corporate "personhood," saying in the Citizens United case that corporations have the right to participate in the political process the same way individuals do.

The administration wants the court to hear its appeal of the Denver-based federal appeals court ruling in favor of Hobby Lobby, an Oklahoma City-based arts and crafts chain that calls itself a "biblically founded business" and is closed on Sundays. Founded in 1972, the company now operates more than 500 stores in 41 states and employs more than 13,000 full-time employees who are eligible for health insurance. The Green family, Hobby Lobby's owners, also owns the Mardel Christian bookstore chain.

The 10th U.S. Circuit Court of Appeals said that corporations can be protected by the 1993 law in the same manner as individuals, and "that the contraceptive-coverage requirement substantially burdens Hobby Lobby and Mardel's rights under" the law.

In its Supreme Court brief, the administration said the appeals court ruling was wrong and, if allowed to stand, would make the law "a sword used to deny employees of for-profit commercial enterprises the benefits and protections of generally applicable laws."

In two other cases, courts ruled for the administration. Conestoga Wood Specialties Corp., a Pennsylvania company that employs 950 people in making wood cabinets, is owned by a Mennonite family. Autocam Corp. is a Michigan-based maker of auto parts and medical devices that employs more than 650 people in the United States.

The companies that have sued over the mandate object to different forms of birth control. Conestoga Wood objects to the coverage of Plan B and Ella, two emergency contraceptives that work mostly by preventing ovulation. The FDA says on its website that Plan B "may also work by preventing fertilization of an egg ... or by preventing attachment (implantation) to the womb (uterus)," while Ella also may work by changing of the lining of the uterus so as to prevent implantation.

Hobby Lobby objects to those two forms of contraception as well as two types of intrauterine devices (IUDs). Its owners say they believe life begins at conception, and they oppose only birth control methods that can prevent implantation of a fertilized egg in the uterus, but not other forms of contraception.

Autocam does not want to pay for any contraception for its employees because of its owners' Roman Catholic beliefs.

Physicians for Reproductive Health, the American College of Obstetricians and Gynecologists and other medical groups tell the court that the scientific and legal definition of pregnancy begins with implantation, not fertilization. Contraceptives that prevent fertilization from occurring, or even prevent implantation, do not cause abortion "regardless of an individual's personal or religious beliefs or mores," the groups said.

But another brief from the American Association of Pro-Life Obstetricians and Gynecologists, the Catholic Medical Association and others say in a separate filing that "it is scientifically undisputed that a new human organism begins at fertilization." Emergency contraception that works after fertilization "can end the life of an already developing human organism," regardless of the definition of pregnancy, they said.

Al Jazeera and The Associated Press