Question: the federal court system is established under which article of the constitution answers.com

title: Sixteenth Amendment to the United States Constitution
text: Alabama ( August 10 , 1909 ) Kentucky ( February 8 , 1910 ) South Carolina ( February 19 , 1910 ) Illinois ( March 1 , 1910 ) Mississippi ( March 7 , 1910 ) Oklahoma ( March 10 , 1910 ) Maryland ( April 8 , 1910 ) Georgia ( August 3 , 1910 ) Texas ( August 16 , 1910 ) Ohio ( January 19 , 1911 ) Idaho ( January 20 , 1911 ) Oregon ( January 23 , 1911 ) Washington ( January 26 , 1911 ) Montana ( January 27 , 1911 ) Indiana ( January 30 , 1911 ) California ( January 31 , 1911 ) Nevada ( January 31 , 1911 ) South Dakota ( February 1 , 1911 ) Nebraska ( February 9 , 1911 ) North Carolina ( February 11 , 1911 ) Colorado ( February 15 , 1911 ) North Dakota ( February 17 , 1911 ) Michigan ( February 23 , 1911 ) Iowa ( February 24 , 1911 ) Kansas ( March 2 , 1911 ) Missouri ( March 16 , 1911 ) Maine ( March 31 , 1911 ) Tennessee ( April 7 , 1911 ) Arkansas ( April 22 , 1911 ) , after having previously rejected the amendment Wisconsin ( May 16 , 1911 ) New York ( July 12 , 1911 ) Arizona ( April 3 , 1912 ) Minnesota ( June 11 , 1912 ) Louisiana ( June 28 , 1912 ) West Virginia ( January 31 , 1913 ) Delaware ( February 3 , 1913 )