The authoritative instrument for the distribution of all forms of official IRS tax guidance is the Internal Revenue Bulletin (IRB), a weekly collection of these and other items of general interest to the tax professional community.
perfidy definition: The definition of a perfidy is a deliberate betrayal. (noun) An example of a perfidy is spreading a best friend's secrets all over town....
noun perÂ·misÂ·sion \pÉr-Ëmi-shÉn\. : the right or ability to do something that is given by someone who has the power to decide if it will be allowed or permitted.