Interesting. There seems to be some discrepency between our sources. I use Cornell Law web page https://www.law.cornell.edu/uscode/text/8/1101
Under that page, I cant find the section that you appear to be quoting. The section that starts “For the purposes....”
Can you provide to me your source?
http://www.state.gov/documents/organization/86759.pdf
7 FAM 1151 INTRODUCTION (CT:CON-577; 05-27-2015)