The California Air Resources Board (CARB) enacted regulations lowering the allowable Maximum Incremental Reactivity (MIR) values for some aerosol coating categories. The lower limits came into effect 1/1/2017. All products manufactured after that date were required to comply with the new lower limits. There is a three-year sell through period; the sell through period expires December 31, 2019.Lancaster has been working with our vendors and discontinued shipping to our customers any items manufactured under the old MIR limits. Although highly unlikely, if you think you may have any aerosols that were manufactured before 1/1/2017 then those items should be removed from your store shelves.