To account for increased transport of hazardous materials as well as the burdens such transport places on first responders, PHMSA proposed updates to the registration fees under the statutorily mandated registration and fee assessment program for persons who transport, or offer for transportation, certain categories and quantities of hazardous materials. Actions such as fee adjustments are necessary to fund PHMSA's Hazardous Materials Emergency Preparedness grants program at newly authorized levels in accordance with the Infrastructure Investment and Jobs Act. PHMSA also proposed to implement an electronic-only registration fee payment process. Finally, PHMSA proposed to revise requirements to clarify that a certificate of registration may be carried in either electronic or paper form for both motor carriers and those who transport hazardous materials by vessel. However, after a thorough review of the issues involved, PHMSA has decided to withdrawal this rulemaking action in the near future.