And the (OFF-MIKE) indication that one was not meant to be a substitute for the other can be found in Article I, section three, clause seven of the Constitution.

CNN

MPs rejected by three votes a clause in the government's Parliamentary Standards Bill to allow their proceedings to be used in court against an errant MP, breaking the long standing right to Parliamentary privilege.

BBC: Brown condemns 'personal attacks'

The Court has not used the equal protection clause to create a new category of people who need extra legal defenses in three decades, largely because doing so disrupts the ebb and flow of the ordinary political process.

WSJ: Review & Outlook: Marriage and the Supreme Court

In the last year only three executives, all in the Northern Board, used the exceptional circumstances clause to withhold the details.

BBC: ?16m to compensate health staff