### Question
How does PENNSYLVANIA AVENUE DEVELOPMENT define substantial change?


### Answer
Under *40 U.S.C. § 874*, **substantial change** is defined as:

> one involving a major alteration in the character or intensity of an existing or proposed use in the development area which in the opinion of the Corporation causes an increase or decrease of 10 per centum or more of the dollar amount of the estimate prepared in accordance with subsection (a)(9) of this section, or one which, in the opinion of the Secretary of the Interior, affects his responsibilities for the administration, protection, and development of the areas within the Pennsylvania Avenue National Historic Site.

#### Citation:
  - *40 U.S.C. § 874*
  - Heading: **CHAPTER 19-CAPITOL AND WHITE HOUSE-PENNSYLVANIA AVENUE DEVELOPMENT**

