It's called the United States Code. It is code, not law. A code of conduct that govt employees, agents, and possibly registered vendors must follow. Marines likely have a code. Does thou follow the Marines code? Then why does thou think the US Code restricts thy actions? 

The US Code is an employee handbook exclusively for US Govt officers, also defined as Citizen #512296.

"We in fact all share the same proud title. The most important office in the democracy. Citizen." —Obama https://www.merriam-webster.com/dictionary/citizen

"Citizen" is office/title in govt, just as private companies have 'Director" as an office/title.

Are you proud of the title thou got at birth?