That exception is triggered in a claim of a violation of the Establishment Clause and when there is a specific legislative grant for spending that implicates the First Amendment.

CENTERFORSECURITYPOLICY: AIG_shariah

However broad the President's authority may be to recognize States and governments of States under the "receive Ambassadors" clause, it is necessarily limited by the specific Constitutional requirement for Senate advice and consent on the making of treaties.

CENTERFORSECURITYPOLICY: Center For Security Policy

And by relying on one specific constitutional provision--Article II, section 1, clause 2--it could end that process without doing too much violence to the rest of the Constitution.

FORBES: Top Of The News: Counting Justices