When a new tax law is passed, the Committee Report is printed in the IRSâ weekly Internal Revenue Bulletin. The weekly IRS reports are reorganized and published every 6 months in the Cumulative Bulletin.8.4.1 Pronouncements by the IRS 18.4.2 IRS Acquiescence and Nonacquiescence 18.4.3 Internal Revenue Bulletin 18.4.4 Bulletin Index-Digest System 18.4.1 Pronouncements by the IRS There are generally six types of pronouncements: 1. Regulations, 2.
OSB (Oriented Strand Board) is an engineered wood-based panel consisting of strands of wood which are bonded together with a synthetic resin; the strands are pressed together in layers.
However, OSB is generally considered less resistant to water (it swells in thickness when exposed to moisture) and some people prefer plywood for roofs and subfloors. The Miami-Dade County Board of County Commissioners banned OSB for use as roof sheathing after Hurricane Andrew destroyed thousands of homes in 1992.s OSB is cheaper than plywood and has the strength and durability of plywood it is becoming more widely used than plywood. OSB was introduced in the 1970s and steadily gained market share from plywood, surpassing plywood in production in 2000. Today OSB has 70-75% market share and plywood has about 25% share.