Operating Authority & Carrier Registration

USDOT number (free)

Every regulated carrier has a USDOT number. Apply via FMCSA's Unified Registration System (URS) at fmcsa.dot.gov/registration. The number is permanent + identifies the carrier in all FMCSA systems (CSA, Clearinghouse, NTSB crash data, MCS-150 updates).

MC (Motor Carrier) number — for-hire only ($300)

Need an MC if you transport for compensation (for-hire). Three flavors:

• MC — general freight or property
• MX — Mexican-domiciled carriers operating in US
• FF — freight forwarders

Private carriers (hauling own products) do NOT need an MC.

BOC-3 process agent

Interstate carriers must designate a process agent in each state for service of legal process. Easiest: file a blanket BOC-3 through a registered process agent service (~$25-75 one-time). The agent file with FMCSA on your behalf.

Insurance filing

Filed by your insurance company directly with FMCSA. Carrier doesn't file; the insurer does.

• MCS-90 endorsement — required on every hazmat carrier's policy; ensures public obligation is met
• BMC-91 / BMC-91X — property carrier liability ($750K for general freight; up to $5M for hazmat)
• BMC-32 — passenger carrier liability ($1.5M-$5M)
• BMC-34 (cargo) — required for HHG; optional otherwise

If insurance lapses, FMCSA suspends operating authority within ~30 days.

UCR (Unified Carrier Registration)

Annual fee based on fleet size. As of 2026:

Fleet size	UCR fee (annual)
0-2	$46
3-5	$138
6-20	$276
21-100	$963
101-1000	$4,592
1001+	$44,851

Pay through any participating state's UCR portal (most states participate).

IRP (International Registration Plan)

For vehicles operating in 2+ jurisdictions at 26,001+ lb (or 3+ axles). One apportioned plate lets the vehicle operate in any IRP jurisdiction; fees split across jurisdictions based on miles traveled.

Apply through your base jurisdiction (state of registration). Receive an apportioned plate + cab card listing all jurisdictions.

IFTA (International Fuel Tax Agreement)

See dedicated ifta-quarterly-prep skill. Required for interstate carriers at 26,001+ lb / 3+ axles.

State-level permits & taxes

Several states have their own road-use taxes beyond IFTA:

• NY HUT (Highway Use Tax) — file quarterly; based on miles + axles
• KY KIT (Kentucky Intrastate Tax) — quarterly; based on miles
• OR Weight-Mile Tax — Oregon-specific; quarterly
• NM Weight-Distance Tax — quarterly
• CT Highway Use Fee — newer, applies to vehicles over 26,000 lb traveling in CT

These are NOT part of IFTA and must be filed separately. Each has its own renewal + permit requirements.

New entrant safety audit

Within 18 months of receiving operating authority, every new carrier gets a NESA (New Entrant Safety Audit) — see the dot-audit-readiness skill for what to expect.

Quarterly compliance calendar

Month	What's due
January	IFTA Q4 return (1/31); UCR if renewing
March	MCS-150 update if DOT number triggers it
April	IFTA Q1 return (4/30); NY HUT, KY KIT, OR Weight-Mile, NM Weight-Distance
July	IFTA Q2 (7/31); state taxes
September	MCS-150 update if DOT number triggers it
October	IFTA Q3 (10/31); state taxes
December	Year-end financial review; UCR for following year

Common operating-authority mistakes

1. MCS-150 not updated every 24 months. Authority deactivated after 90 days overdue.
2. Insurance lapse. Even a 1-day gap triggers suspension.
3. UCR not paid by deadline. Roadside inspections check UCR; OOS possible.
4. IRP cab card not in vehicle. Roadside OOS possible.
5. Carrying intrastate authority while operating interstate. Federal violation; significant penalty.
6. Operating under wrong MC number (e.g., dormant company instead of active company).

Where this fits in X3

X3's control-center.html (internal) tracks MCS-150 due dates per customer. check-mcs150-status Edge Function runs daily and surfaces approaching deadlines. The compliance-notifications daily digest includes MCS-150 + insurance + UCR status.

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