The US Department of Housing and Urban Development (HUD) formaldehyde regulations of composite wood products began in the early 1980s for particleboard and decorative plywood panels used in manufactured homes.  Upper limits for formaldehyde emission rates have been established for wood panel building products made with urea-formaldehyde adhesives and permanently installed in homes or used as components in kitchen cabinets and similar industrial products.   Testing used to monitor products for compliance confirms the emission levels from moisture resistant phenol formaldehyde adhesives used to make engineered wood products, including structural plywood, are very low and readily meet the plywood emission limits; therefore, the HUD regulations explicitly exempt phenolic bonded plywood from ongoing testing and certification.  The California Air Resources Board (CARB) Airborne Toxic Control Measure (ATCM) formaldehyde regulations for composite wood products accepts the demonstrated low emission levels of engineered wood products recognized in US and Canadian building codes for structural applications and explicitly exempts certified structural plywood specified to product standards PS-1, CSA-0121, and CSA-0151. The implementation of the national formaldehyde emissions regulations within the US Environmental Protection Agency (EPA) Toxic Substance Control Act (TSCA) Title VI is aligned with the requirements of CARB.  The scope of both these regulations is specific to particleboard, medium density fiberboard (MDF) and hardwood/decorative plywood and finished goods manufactured from them.  The U.S. Formaldehyde Standards from Composite Wood Products Act explicitly exempts certified structural plywood specified to product standard PS-1, CSA-0121, and CSA-0151. Richply uses only phenol formaldehyde resin adhesives in 100% of the plywood we manufacture.  All plywood manufactured by Richply contain No Added Urea Formaldehyde (NAUF) and are exempt from US HUD, CARB, and TSCA Title VI formaldehyde regulations due to very low emission rates.