### Question
Can you define what without expense to the United States means?


### Answer
**Without expense to the United States** is defined as the following in *16 U.S.C. § 1251*:

> 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**

