In order to receive full credit for the Discussion, you must post twice. One post must respond to the question/discussion listed below and the second post should respond to a classmate or instructor message. Each post should be at least 100 words long.

Chapter 1 reviews the sources of income tax law we can review when doing research. The Internal Revenue Code is the most authoritative source of income tax law. In trying to resolve an income tax question, however, a tax researcher also consults administrative rulings (Treasury Regulations, Revenue Rulings, etc.) and court decisions. Why wouldn't the tax researcher just consult the IRC since it is the highest authority? Similarly, why is there a need for administrative rulings and court decisions?