SEC. 3. In furtherance of the enforcement of the aforementioned orders of the United States District Court for the Eastern District of Arkansas, the Secretary of Defense is authorized to use such of the armed forces of the United States as he may deem necessary.

SEC. 4. The Secretary of Defense is authorized to delegate to the Secretary of the Army or the Secretary of the Air Force, or both, any of the authority conferred upon him by this Order.

DWIGHT D. EISENHOWER
THE WHITE HOUSE,
September 24, 1957. (10-11)

The last two paragraphs detail the final steps in Eisenhower's plan to enforce the integration law in Little Rock. They're kind of the "or else" part of the order. He allows the defense secretary to use his judgment on which federal troops to call up, and to delegate those powers to other military officials.