It seems that the term was used on a number of pieces of legislation as late as the 1970's. In 2016, President Obama signed legislation into law which struck outdated racial terms such as “Oriental” and “Negro” from federal laws. As this article observes:
Two sections in the U.S. Code written in the 1970s governing public health and civil rights attempted to define minority groups by using the outdated terms.
For those who are interested, the two sections of the U.S. code mentioned above are:
- Section 211(f)(1) of the Department of Energy Organization Act (42
- Section 106(f)(2) of the Local Public Works Capital Development and
Investment Act of 1976 (42 U.S.C. 6705(f)(2))
Even more recently, the term "Negro" was included in the 2010 U.S census:
However, in 2013 the U.S. Census Bureau announced that the term will not appear in future censuses.