TBS 1- Sources of Authority Select from the option list provided the authority described by each statement below. Each choice may be used once, more than once, or not at all. Description Authority 1. Interpretations of specific Code by which the IRS is bound. 2. Announces official IRS rulings and procedures. 3. Explains the law in plain language for taxpayers and their advisors. 4. The primary source of federal tax law. 5. Conclusion of the IRS that is confined to the specific case for which it was issued. 6. Official interpretation of the tax law by the IRS as applied to a given set of facts. 7. Highest level of judicial authority in the realm of tax law. Choices: 1. Supreme Court decisions. 2. Private Letter Rulings. 3. Treasury Regulations. 4. Internal Revenue Bulletins. 5. IRS Revenue Rulings. 6. IRS Publications. 7. Internal Revenue Code