Generally, that language means the attorneys-in-fact can sign together or alone for the principal.
United States Attorneys are the chief prosecutors for the states. They're also referred to as United States District Attorneys.
The head of the United States Department of Justice is the United States Attorney General. As of June 2014, Eric Holder is the Attorney General of the United States.
There is no law that states that the Attorney General must be an attorney.
The U.S. attorney general is appointed by the President of the United States and serves at the pleasure of the President. The President has the power to fire the attorney general.
Some states do require the attorney-in-fact to also sign the form.
In the United States, Attorney-at-law means a lawyer. The distinction is made because people can have "power of attorney" or "letter of attorney", which is referred to as Attorney-in-fact.
Generally the only ones you have to worry about intercepting a refund are State/Gov't debts, but you filed jointly so all debts are joint in many states.
Only three states, plus D.C., appoint the attorney general. See http://www.cga.ct.gov/2003/rpt/2003-R-0231.htm
In the United States, the Attorney General is a cabinet level position. The Attorney General is in charge of the US Justice Department.
Attorney General
An AUSA is an assistant United States attorney.
the states attorney.