The bill was introduced as S.2781 in the United States Senate on November 17, 2009, by Barbara Mikulski (D-MD).
It passed the Senate unanimously on August 5, 2010, then the House of Representatives on September 22, and was signed into law by President Barack Obama on October 5.
[2] The law is named after Rosa Marcellino, a girl with Down syndrome who was nine years old when it became law, and who, according to Barack Obama, "worked with her parents and her siblings to have the words 'mentally retarded' officially removed from the health and education code in her home state of Maryland.
Under Rosa's law, these would be described respectively as profound, severe, and moderate levels of intellectual disability.
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