### Question
How is the term modification defined?


### Answer
The term **modification** is defined in *49 U.S.C. § 22401* as the following:

> any Government action that alters the estimated cost of an outstanding direct loan (or direct loan obligation) or an outstanding loan guarantee (or loan guarantee commitment) from the current estimate of cash flows

#### Citation:
  - *49 U.S.C. § 22401*
  - Heading: **SUBTITLE V-RAIL PROGRAMS > PART B-ASSISTANCE > CHAPTER 224-RAILROAD REHABILITATION AND IMPROVEMENT FINANCING**

