EPA promulgated the User Fee Final Rule on January 3, 2018. The final rule establishes by regulation the methodology the Agency will use to determine and revise the user fees applicable to the electronic and paper manifests to be submitted to the national electronic manifest system (e-Manifest system). After the e-Manifest system's implementation date, certain users of the hazardous waste manifest will be required to pay a prescribed fee for each electronic and paper manifest they use and submit to the national system so that EPA can recover the costs of developing and operating the national e-Manifest system. The final rule also announces that EPA expects the system to be operational and available to users on June 30, 2018. Beginning on that date, EPA will begin accepting manifest submissions and collecting the corresponding manifest submission fees. The final rule also announces final decisions and regulations relating to several non-fee related matters. This includes modifying existing manifest regulations to: allow changes to the transporters designated on a manifest while the shipment is en route; describe how data corrections may be made to existing manifest records in the system; and amend the previous e-Manifest regulation promulgated on February 14, 2014, to allow the use, in certain instances, of a mixed paper and electronic manifest to track a hazardous waste shipment.