By a vote of 5 to 4, the Court said the law amounted to economic protectionism that placed an unconstitutional burden on interstate commerce.

It also ruled that Maine's effort to limit the revenue of out-of-state manufacturers and distributors was an unconstitutional burden on interstate commerce.

Senate Bill 761 "would create an unnecessary, unenforceable and unconstitutional regulatory burden on Internet commerce," says the letter in opposition to the measure.

The restrictions were "not only cumbersome, but an unconstitutional burden," he said.

Actually they said in their letter that "Senate Bill 761 would create an unnecessary, unenforceable, and unconstitutional regulatory burden on Internet commerce.

The tax had been challenged as an unconstitutional burden on interstate commerce.

"Our argument is that the state controls impose an unconstitutional burden on the rights of parents under the First and 14th Amendments," he said.

The appeals court held that the law placed an unconstitutional burden on the First Amendment right of freedom of association.

The airlines contend that the new fees are unfair and unreasonable, and constitute an unconstitutional burden on interstate travel.

The airlines say the higher fees are unfair and unreasonable, and amount to an unconstitutional burden on interstate travel.