The stacked event GA21 × T25 maize obtained from conventional breeding of the genetically modified maize events GA21 and T25 to express mEPSPS protein which confers tolerance to glyphosate herbicide and enzyme phosphinothricin N-acetyl transferase (PAT) which confers tolerance to glufosinate-ammonium herbicide. The food safety assessment performed by the National Center for Genetic Engineering and Biotechnology (BIOTEC) as advisory and technical arm of Thai FDA. BIOTEC conduct food safety assessment according to codex guideline and based on the safety data and information provided by the applicant (as specified in Annex 2 attached to Notification of the Ministry of Public Health No.431). According to the existing scientific data and information available during the safety assessment, it is concluded that the stacked event GA21 × T25 maize is expected to be as safe as the single events that has previously been assessed by the food biosafety subcommittee and technical biosafety committee of the National Center for Genetic Engineering and Biotechnology (BIOTEC).