Nonnative Invasive Forest Species Initially adopted by the Society on March 3, 2012 and revised in 2017. This position statementwill expire in 2022 unless, after subsequent review, it is further extended by the SAF Board ofDirectors.SAF-Policy-Nonnative-Invasive-Forest-SpeciesDownload Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)