Commonwealth Edison Co. v. Montana

1981

Venue: SCOTUS

Facts: Montana applies a big severance tax on mineral production (low-sulphur coal, esp.).

Posture: Suit in MT court; probably not a success there...

Issue: Does this tax violate the commerce clause?

Holding: No.

Rule: The Complete Auto Transit test: a tax is ok if it:
  1. Is applied to an activity with substantial nexus to the taxing state
  2. Is fairly apportioned
  3. Does not discriminate against interstate commerce
  4. Is fairly related to services provided by the state

Reasoning: The plaintiffs/appellants don't argue the first two prongs (tactical error). The tax is not discriminatory, in the sense that MT consumers must also pay it: MT is not to blame if most customers are from out of state. The court doesn't involve itself in questions of whether state tax rates are reasonable, so that can't be the sense of #4-- instead, it's obvious that this tax is directly proportional to the consumption of the taxed thing. The rate of a tax is a matter for the legislature.

Dicta: Dissent: hey, most of this coal comes from federally-owned land.