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....
Permeance is defined to be the gas flow rate through the material, per unit of area and per unit of pressure difference across the material. The unit is equal to 10 4 barrer per centimeter, or 10-6 cmÂ·s-1 Â·cmHg-1, or, in SI units, 7.5005 x 10-16 mÂ·s-1 Â·Pa-1. gauge (ga) [1] a traditional unit measuring the interior diameter of a shotgun barrel.