This was a vote to pass S. 181 (111th) in the Senate.
The Lilly Ledbetter Fair Pay Act of 2009 (Pub.L. 111–2, S. 181) is a federal statute in the United States that was the first bill signed into law by US President Barack Obama on January 29, 2009. The Act amends the Civil Rights Act of 1964 and states that the 180-day statute of limitations for filing an equal-pay lawsuit regarding pay discrimination resets with each new paycheck affected by that discriminatory action. The law directly addressed Ledbetter v. Goodyear Tire & Rubber Co., 550 U.S. 618 (2007), a U.S. Supreme Court decision that the statute of limitations for presenting an equal-pay lawsuit begins on the date that the employer makes the initial discriminatory wage decision, not at the date of the most recent paycheck.
An earlier bill seeking to supersede the Ledbetter decision, also called the Lilly Ledbetter Fair Pay Act, was first introduced in the 110th United States Congress but was not successfully enacted at that time, as it was passed by the House but failed in the Senate.
During the campaign for the 2008 elections, the Democrats criticized Republicans for defeating the 2007 version of the bill, citing Republican presidential candidate John McCain's opposition to the bill and candidate Barack Obama's support.
This summary is from Wikipedia.