This notice proposes qualification standards for personnel who perform, or directly supervise those persons performing, regulated operation, maintenance, and emergencyresponse functions. This action would amend current standards for training personnel performing operating or maintenance activities on hazardous liquid and carbon dioxide pipelines, and extend those standards to personnel performing similar functions on gas pipelines. This action is taken to ensure that pipeline personnel have the necessary knowledge and skills to competently perform these regulated functions. The intended effect of this proposed rulemaking is to improve pipeline safety by requiring operators to assure the competency of pipeline personnel through training, testing, and periodic refresher training.