Waterway rules and jurisdiction: overview

Orientation only, not legal advice, not a substitute for agency-specific current rules. Regulations are fragmented across federal, state, tribal, and local authorities. Identifying the governing agency is itself a required step before relying on general guides. Contact the managing agency before launching on unfamiliar waters.

• Federal law sets a BAC floor of 0.08% on waters under federal jurisdiction. The USCG can enforce BUI (boating under the influence) on any waters under federal jurisdiction. But the applicable BAC threshold, specific penalties, and enforcing agency depend on which authority governs the water you are on, and in most cases, both federal and state BUI law apply simultaneously.
• State law frequently sets stricter rules than the federal floor. On a state-managed lake, state BUI law applies and state officers enforce it. Some states have lower BAC thresholds than 0.08%, and many states carry additional per se provisions for other impairing substances. On a federal reservoir inside a state, both federal and state BUI law may apply at once; you can be cited under either or both.
• The effective threshold is whichever is stricter on the specific water. Because both federal and state law can apply simultaneously, the governing threshold on any given water is the stricter of the two. For any unfamiliar water, check the state boating code and confirm whether additional federal rules apply. Penalties are serious: federal BUI carries a civil penalty of up to $5,000 or a class A misdemeanor (46 USC 2302). Grossly negligent operation that causes serious injury can be a felony, and state penalties may be higher.

• Federal floor: 0.08% BAC on waters under federal jurisdiction, enforced by USCG. State BUI law applies within state borders simultaneously; both can result in citations.
• State law may set a lower BAC threshold or additional per se provisions. Stricter rule governs. Federal reservoir inside a state: both federal and state BUI law apply.
• Effective threshold: stricter of federal and state law for the specific water. Federal BUI: civil penalty up to $5,000 or a class A misdemeanor (46 USC 2302). Grossly negligent operation causing serious injury can be a felony.

• State Lakes and Ponds: state agency primary, registration, speed/wake zones, seasonal closures, invasive species
• Federal Reservoirs (ACOE, BOR, TVA): federal baseline + state overlay, launch permits, discharge restrictions, invasive species programs
• Navigable rivers, locks, and dams: USCG/federal navigation rules, ACOE locks, commercial traffic, lowhead dam hazards, invasive species
• Great Lakes: USCG Great Lakes District, US-Canada border, VHF, open-lake weather routing, invasive species programs
• National Park and NRA waters: NPS compendiums, superintendent authority, permits, greywater rules
• Coastal, tidal, ICW, and offshore: COLREGs demarcation, ICW rules, bridge openings, EPIRB
• Resources: federal agencies, state boating agencies, training, weather/charts

• Different bodies of water are managed by different agencies. A state lake, a federal reservoir, a national park river, and an offshore channel each operate under different legal authority. In most cases, state boating laws still apply everywhere within state borders, but a federal or tribal overlay can add restrictions, require permits, and introduce regulations that don't appear in the standard state boating handbook.
• The main categories of managing authority. State agencies (fish and wildlife, natural resources, or parks departments) govern most inland lakes, ponds, and streams. The Army Corps of Engineers manages hundreds of reservoirs built on rivers impounded for flood control and navigation. The National Park Service governs waters inside park and recreation area boundaries. The Bureau of Reclamation manages reservoirs in the western states. The USCG and federal admiralty law govern navigable coastal and interstate waters. Tribal nations hold sovereign authority over waters within reservation boundaries.
• When authority overlaps, the most restrictive rule governs. On an Army Corps reservoir inside a state, both state boating law and Corps regulations apply. If the state requires registration and the Corps requires a launch permit, you need both. If the Corps prohibits personal watercraft in a cove and the state generally allows them, the Corps prohibition controls on that water.
• No single source covers every rule for every body of water. State boating handbooks cover state law. Corps project offices publish their own rules by lake. NPS publishes regulations per unit (each park or NRA is separate). The practical approach: before launching on an unfamiliar body of water, look up the managing agency for that specific lake, reservoir, or river segment, not just the state general boating rules.

• State boating law applies within state borders, but federal or tribal overlays add regulations and may require separate permits.
• Managing authority by type: state agencies (most inland lakes), Army Corps (flood-control reservoirs), NPS (park and NRA waters), Bureau of Reclamation (western reservoirs), USCG (navigable coastal and interstate waters), tribal nations (reservation waters).
• Overlapping authority: most restrictive rule governs. State + Corps = need both registrations, permits, and comply with the stricter operational restriction.
• No single source covers every water. Check the managing agency per specific lake or river segment before launching.

• Navigable waters of the US (used or capable of use in interstate/foreign commerce): federal jurisdiction. COLREGs and Inland Rules apply regardless of state law.
• Inland, landlocked state lakes: state law governs speed, wake, registration, and PFD rules. Enforcement by state/local officers.
• USCG safety equipment requirements (PFDs, fire extinguisher, nav lights, flares) apply on all waters regardless of jurisdiction.
• State registration required within the state on virtually all waters. Federal documentation substitutes on federal waters for qualifying vessels; most recreational boats use state registration.

• On most federal waters, you face a stack of rule sets, not just one. A typical day on an Army Corps reservoir means: state registration (required by the state), Corps launch permit (required by the project), state speed and wake rules, Corps operational rules (additional restricted areas, horsepower limits, quiet hours), and USCG safety equipment standards. Each layer adds to the one below it; they don't replace each other.
• State parks on navigable rivers are another common overlap. A river designated as a navigable waterway carries federal navigation rules and USCG authority, but if it passes through a state park, the park's operational regulations also apply (hours, designated launch areas, fee requirements, watercraft restrictions). Both apply simultaneously.
• Tribal waters require separate research. Tribal nations exercise sovereign authority over waters within reservation boundaries. Rules vary widely and may include fishing permit requirements, watercraft restrictions, access fees, or prohibitions on certain activities that would otherwise be lawful under state law. Non-tribal members are guests and must comply with tribal regulations. Contact the tribal office or wildlife management department for the specific water you plan to use.
• Practical approach: check all three levels before an unfamiliar launch. Start with your state boating handbook for baseline requirements. Then check the managing agency for the specific body of water (Corps, NPS, BOR, tribal). Then check for any active permits or closures posted at the launch area.

• Army Corps reservoir example: state registration + Corps launch permit + state operational rules + Corps project rules + USCG safety equipment. All apply simultaneously.
• Navigable river through a state park: federal navigation rules + USCG safety + state park operational rules (access, hours, fees) all apply at once.
• Tribal waters: sovereign authority, independent of state law. Verify rules with tribal office before launching; restrictions and permit requirements vary by nation and water body.
• Pre-launch checklist: state boating code baseline, managing agency project rules, any current permit or closure postings at the ramp.

• Start with who manages the land around the water. Look the body of water up on a map. If it's on Army Corps property (often labeled as a Corps park or recreation area), the Corps project office website has operational rules and required permits. If it's inside a national park or NRA boundary, the park's website has the watercraft regulations. If it's a state reservoir or state-managed lake, the state parks or natural resources agency website has it.
• Call the managing office if the website is unclear. Corps project offices, park ranger stations, and state recreation offices all have staff who can tell you whether a launch permit is required, what watercraft are allowed, and whether any seasonal closures are in effect. A two-minute phone call is more reliable than trying to interpret a PDF regulations packet written in regulatory language.
• Read the launch area signage before you put the boat in the water. Many waters post current restrictions, area closures, and permit requirements at the launch ramp. Rules can change seasonally and are often not updated in time on the website. Signage at the ramp is the most current source.
• The specific guides in this section cover each water type in detail. Use the type-specific guides (state lakes, federal reservoirs, rivers, Great Lakes, NPS waters, and coastal) for the full rules applicable to each category. This overview is the starting point; the waterway-type guides go deeper.

• Identify the managing agency from a map (Corps, NPS, BOR, state agency, tribal). Go directly to that agency's project page, not a general boating summary.
• Call the project or ranger office for current conditions, permit requirements, and any closures. More reliable than regulation PDFs for operational specifics.
• Read launch ramp signage on arrival: most current source for active closures and permit requirements.
• See the waterway-type guides in this section (state lakes, federal reservoirs, rivers, Great Lakes, NPS, coastal) for full coverage by category.