Ian, here's the rest of the requirements.
(1) All Army aircraft that are instrumented for IFR flight and are flown by an instrument rated pilot will operate on
IFR flight plans except when—
(a) Flight is primarily for VFR training.
(b) Time will not permit mission completion under IFR.
(c) Mission can only be accomplished under VFR.
(d) Excessive air traffic control (ATC) departure, en route, or terminal area delays are encountered.
(e) Hazardous weather conditions must be avoided.
(f) Requirements of paragraph 4-23d are not met. My remarks in parentheses. (This requires two Aviators, current in category for flight into forecast IMC.)