What was the question for this implicit rationale, and corresponding answer?
To answer the above question, the relevant sentence is: On June 27, 2003, the U.S. Federal Trade Commission (FTC) opened the National Do Not Call Registry in order to comply with the Do-Not-Call Implementation Act of 2003 ( Pub. L. 108 -- 10, was H.R. 395, and codified at 15 U.S.C. 6101 et.
The answer: June 27 , 2003
The question: On June 27, 2003, the U.S. Federal Trade Commission (FTC) opened the National Do Not Call Registry in order to comply with the Do-Not-Call Implementation Act of 2003 (Pub. L. 108 -- 10, was H.R. 395, and codified at 15 U.S.C. 6101 et. seq.), sponsored by Representatives Billy Tauzin and John Dingell and signed into law by President George W. Bush on March 11, 2003. The law established the FTC's National Do Not Call Registry in order to facilitate compliance with the Telephone Consumer Protection Act of 1991.

Answer this question: when was the do not call registry established?