Final answer:
The regulation that allows the federal government to aid state resources during disasters is the Robert T. Stafford Disaster Relief and Emergency Assistance Act, which gives the President authority to declare emergencies and disasters.
Step-by-step explanation:
The regulation that provides a means for the federal government to supplement state resources in major disasters and emergencies when state resources are inadequate is the Robert T. Stafford Disaster Relief and Emergency Assistance Act. This act, often simply referred to as the Stafford Act, was enacted in 1988 and is designed to bring an orderly and systematic means of federal natural disaster assistance for state and local governments in carrying out their responsibilities to aid citizens. The Act authorizes the President to issue declarations of emergencies and major disasters and to provide the necessary assistance to help state and local governments manage the situation.