The federal government responded to the 1970s energy crisis with a layered strategy: emergency conservation rules, price controls on oil, a new Cabinet department, a national oil stockpile, mandatory fuel-economy standards for automakers, tax incentives for conservation and renewables, and eventually a windfall tax on domestic crude. Understanding how the government responded to the 1970s energy crisis means looking at all of these together, because no single law carried the load. The 1973 OPEC embargo pushed crude from about $2.90 per barrel to $11.65 per barrel within months,1Federal Reserve History. Oil Shock of 1973-74 and the 1979 disruption tied to the Iranian Revolution kept the pressure on Washington through the end of the decade.
Emergency Conservation Measures
The first federal moves aimed at cutting fuel demand quickly. Signed on January 2, 1974, the Emergency Highway Energy Conservation Act (Public Law 93-239) required every state to cap highway speeds at 55 miles per hour or risk losing federal highway funding.2GovInfo. Public Law 93-239 – Emergency Highway Energy Conservation Act The national limit stayed in force until the National Highway System Designation Act of 1995 repealed it and returned speed-limit authority to the states.3Federal Highway Administration. NHS Summary
Congress also passed the Emergency Daylight Saving Time Energy Conservation Act of 1973, putting the country on year-round daylight saving time to shave evening electricity demand.4Legal Information Institute. Emergency Daylight Saving Time Energy Conservation Act of 1973 The change took effect in January 1974 and ran through the last Sunday of April 1975.5Office of the Law Revision Counsel. 15 USC 260a – Advancement of Time or Changeover Dates Dark winter mornings raised safety concerns for schoolchildren, and Congress let the mandate expire.
At service stations, odd-even rationing spread. Drivers with license plates ending in an odd number could buy gasoline only on odd-numbered days, and drivers with even plates could buy on even days, spreading demand across the week. The government went further behind the scenes: officials had roughly 4.8 billion gasoline-rationing coupons printed and stored, with plans to distribute them through the Postal Service’s roughly 40,000 post offices every two months. The coupon program was never deployed, but its readiness signaled how seriously officials treated the risk of a prolonged shortage.
Price Controls and Oil Allocation
The Emergency Petroleum Allocation Act of 1973 (Public Law 93-159) gave the federal government broad authority over petroleum prices and distribution.6Office of the Law Revision Counsel. 15 USC Ch. 16A – Emergency Petroleum Allocation The statute set up a two-tier pricing system. “Old oil” from wells drilled before 1973 was capped at about $5.25 per barrel. “New oil” from wells that began producing afterward could sell at market rates. The idea was to hold consumer prices down while still giving producers a reason to drill.
Mandatory allocation rules directed fuel to priority sectors like agriculture and emergency services. In practice, allocation formulas often left some regions with fuel in storage while others faced empty pumps, and federal authorities kept adjusting the rules. By the late 1970s, policymakers accepted that price controls were suppressing the domestic production they wanted, and the administration began phasing regulations out.
Project Independence and a New Department of Energy
In a November 1973 address, President Nixon announced “Project Independence” and pledged that by 1980 the United States would meet its energy needs from domestic resources. He described the effort as larger than the Manhattan Project and asked Congress to create an Energy Research and Development Administration to lead the work.7The American Presidency Project. Address to the Nation About Policies To Deal With the Energy Shortages The self-sufficiency target was never met, but the initiative pushed Congress toward a permanent restructuring.
That restructuring came with the Department of Energy Organization Act of 1977 (Public Law 95-91). The law consolidated energy functions from across the executive branch, including the Energy Research and Development Administration and the Federal Power Commission, into a single Cabinet-level department.8U.S. Nuclear Regulatory Commission. Atomic Fission – The Breakup of the Atomic Energy Commission For the first time, one department oversaw research, nuclear programs, regulation, and energy data collection, giving the executive branch a coordinated view of national energy trends.
The Strategic Petroleum Reserve
The Energy Policy and Conservation Act of 1975 (Public Law 94-163) authorized the Strategic Petroleum Reserve, a federal stockpile of crude oil for use in future supply emergencies. Congress set an initial storage target of up to one billion barrels of petroleum products.9Office of the Law Revision Counsel. 42 USC 6231 – Congressional Finding and Declaration of Policy Oil is stored in deep underground salt caverns along the Gulf Coast of Texas and Louisiana, where the geology keeps storage costs low and existing pipelines and shipping channels are close at hand.10Department of Energy. SPR Quick Facts
The President has authority to release oil from the reserve during severe supply emergencies. The stockpile reached its peak of about 727 million barrels in December 2009. Current authorized storage capacity is 714 million barrels.10Department of Energy. SPR Quick Facts Membership in the International Energy Agency also obligates the United States to hold oil stocks equivalent to at least 90 days of net imports and to participate in coordinated releases during global disruptions.11International Energy Agency. Oil Security and Emergency Response
Fuel Economy Standards and the Gas Guzzler Tax
The same 1975 law introduced Corporate Average Fuel Economy standards, requiring automakers to raise the average efficiency of the vehicles they sold.12Office of the Law Revision Counsel. 49 USC 32902 – Average Fuel Economy Standards Congress set a fleet average of 18 miles per gallon for passenger cars by 1978 and a long-term target of 27.5 miles per gallon by the 1985 model year. Meeting those numbers pushed manufacturers toward lighter materials, smaller engines, and more efficient drivetrains.
The National Highway Traffic Safety Administration was given authority to oversee compliance and adjust future standards for what was technologically and economically feasible.12Office of the Law Revision Counsel. 49 USC 32902 – Average Fuel Economy Standards Manufacturers that fall short face civil penalties calculated by multiplying the shortfall in tenths of a mile per gallon by the number of vehicles in the fleet. The original rate was $5 per tenth per vehicle. It reached $15 per tenth for the 2022 model year.13Federal Register. Civil Penalties
The Energy Tax Act of 1978 added a federal excise tax on new passenger cars that missed minimum fuel economy thresholds. Vehicles rated at 22.5 miles per gallon or higher owe nothing. The tax scales sharply below that, starting at $1,000 for cars rated between 21.5 and 22.5 miles per gallon and rising for less efficient models.14Office of the Law Revision Counsel. 26 USC 4064 – Gas Guzzler Tax Unlike CAFE, which applies to a fleet average, the gas guzzler tax hits each inefficient model individually.
The National Energy Act of 1978
By 1978, Congress bundled five laws into the National Energy Act, a comprehensive package covering utilities, natural gas, power plant fuels, taxes, and building conservation.
Utility Purchases from Small Producers
The Public Utility Regulatory Policies Act required electric utilities to buy power from qualifying small-scale producers, including cogeneration plants and renewable energy facilities.15Federal Energy Regulatory Commission. PURPA Qualifying Facilities Before the law, independent producers had no guaranteed access to the grid. Requiring utilities to purchase power at set rates opened a market for wind, solar, biomass, and small hydroelectric generation.
Natural Gas Decontrol
The Natural Gas Policy Act of 1978 began unwinding federal price controls on natural gas. Rather than lifting controls immediately, the law set a schedule ending federal regulation of “new” wellhead prices by January 1, 1985.16LIHEAP Clearinghouse. An Overview and History of Gas Deregulation The phased approach tried to balance consumer prices against production incentives.
Restrictions on Oil and Gas at Power Plants
The Powerplant and Industrial Fuel Use Act barred new electric power plants from using oil or natural gas as a primary fuel, steering utilities toward coal and other alternatives.17Office of the Law Revision Counsel. 42 USC Ch. 92 – Powerplant and Industrial Fuel Use New base-load plants had to be built with the capability to burn coal or another alternate fuel. The goal was to reserve limited oil and gas for uses like transportation and home heating, where substitutes were harder to find.
Tax Credits for Conservation and Solar
The Energy Tax Act of 1978 used the tax code to encourage conservation and renewables. Homeowners who installed solar energy equipment could claim a credit of 30 percent on the first $2,000 of expenditures and 20 percent on the next $8,000, up to a maximum of $2,200.18Internal Revenue Service. Residential Energy Credit, 1978-1980 Businesses received a temporary 10 percent investment tax credit for energy property that used resources other than oil or natural gas.
Residential Information and Federal Buildings
The National Energy Conservation Policy Act of 1978 required utilities to inform residential customers about energy-saving improvements — insulation, storm windows, clock thermostats, furnace upgrades, and solar devices — and the likely savings from installing them.19GovInfo. National Energy Conservation Policy Act The law also set efficiency targets for federal buildings, holding the government to the same standards it was pushing on the public.
The Windfall Profit Tax and Synthetic Fuels
As price controls were lifted, Congress worried that domestic producers would collect enormous gains from the resulting price increases. The Crude Oil Windfall Profit Tax Act of 1980 imposed a federal excise tax on domestically produced crude, calculated as the difference between the market price and an adjusted base price for each barrel. Rates varied by oil type: older, established wells were taxed as high as 70 percent, while newly discovered oil and heavy oil faced a 30 percent rate.20Internal Revenue Service. Windfall Profit Tax, 1980-81 The tax generated more than $17 billion in federal revenue in its first year alone.
A portion of that revenue funded alternative energy development. The Energy Security Act of 1980 created the United States Synthetic Fuels Corporation, a government-sponsored entity charged with producing fuel from coal, oil shale, and other non-petroleum sources. Congress authorized billions for the effort. The corporation was dissolved in 1986 after oil prices collapsed and the economics of synthetic fuels weakened.
What Stuck and What Didn’t
Some of the responses became permanent fixtures of federal energy policy. The Department of Energy still coordinates national energy programs. The Strategic Petroleum Reserve still holds hundreds of millions of barrels for emergency release. CAFE standards still govern what carmakers sell, and PURPA-era rules still shape how independent power producers connect to the grid.
Other measures didn’t outlast the crisis. Year-round daylight saving time was allowed to expire. The 55 mph national speed limit was repealed in 1995. Odd-even rationing eased once supplies stabilized, and the printed gasoline coupons stayed in storage. Price controls on oil were phased out because they discouraged the domestic production they were meant to complement, and the Synthetic Fuels Corporation was closed after spending billions. The overall shift was away from direct market intervention and toward a mix of strategic reserves, efficiency mandates, tax incentives, and support for renewable energy that still forms the backbone of federal energy policy today.