Here is a timeline of key events related to the health reform law and the Department of Health and Human Services’ requirement that contraceptives, including some abortion-inducing drugs, and sterilizations be covered free of charge in most health plans.

Feb. 22, 2010: President Barack Obama releases his proposal for health reform.

March 23, 2010: The Patient Protection and Affordable Care Act is signed into law.

Jan. 19, 2011: House of Representatives votes 245-189, mostly along party lines, to repeal the Affordable Care Act.

Feb. 2, 2011: Senate vote on repeal bill fails, 51-47.

July 19, 2011: An Institute of Medicine panel recommends that sterilizations and all contraceptives approved by the Food and Drug Administration be included free of charge among mandated preventive services for women in all health plans.

Aug. 1, 2011: HHS Secretary Kathleen Sebelius announces that the federal government has accepted the panel’s recommendations and outlines as an “interim final rule” a narrow, four-pronged religious exemption to the contraceptive mandate.

Sept. 30, 2011: A 60-day comment period on the mandate and religious exemption ends.

Nov. 8, 2011: Cardinal Timothy M. Dolan of New York, president of the U.S. Conference of Catholic Bishops, has a private meeting with Obama at the White House.

Nov. 10, 2011: Belmont Abbey College in North Carolina becomes the first Catholic institution to file suit against the mandate.

Jan. 20, 2012: Sebelius announces that nonprofit groups that do not provide contraceptive coverage because of their religious beliefs will get an additional year “to adapt to this new rule.”

February 2012: Then-Bishop William E. Lori, now archbishop of Baltimore, testifies before Congress twice in his capacity as chairman of the USCCB Ad Hoc Committee on Religious Liberty.

March 14, 2012: The USCCB Administrative Committee issues “United for Religious Freedom,” a statement on various threats to religious liberty in the United States.

March 16, 2012: HHS issues an “advance notice of proposed rulemaking” offering an “accommodation” that would allow nonexempt religious employers to contract with a “third-party administrator” or “independent agency” that receive funds from other sources, such as rebates from drug makers, to provide free contraceptives to covered employees.

March 26-28, 2012: The Supreme Court hears oral arguments on various aspects of the health reform law, but not on the mandate.

May 15, 2012: In comments filed with HHS, USCCB attorneys say the proposed “accommodation” does not change the Obama administration’s fundamental position on the mandate and religious exemption.

May 21, 2012: Forty-three dioceses and Catholic organizations file suit in federal courts around the country against the contraceptive mandate.

June 19, 2012: HHS comment period on the proposed accommodation ends.

Aug. 1, 2012: The contraceptive mandate takes effect for new health plans and those that undergo significant changes, unless the narrow religious exemption or the one-year “temporary enforcement safe harbor” for organizations that do not provide contraceptives for religious reasons applies.

Aug. 1, 2013: The “temporary enforcement safe harbor” period ends.