歧视州际贸易

In brief, it is a violation of the commerce clause for a state to pass a law that on its face discriminates against interstate commerce.───简言之，如果一个州通过一部表面上对州际贸易实行差别待遇的法律，那么就是违反了商业条款。

One test governs state legislation that discriminates against interstate commerce.

• discriminates against interstate commerce
• discriminates discrete units of sounds