### Question
How is the "without expense to the United States" defined?


### Answer
The term **without expense to the United States** is defined in *16 U.S.C. § 1251* as follows -

> that no funds may be expended by Federal agencies for the development of trail related facilities or for the acquisition of lands or interests in lands outside the exterior boundaries of Federal areas

#### Citation:
  - *16 U.S.C. § 1251*
  - Heading: **CHAPTER 27-NATIONAL TRAILS SYSTEM**

