Is there a way you could tell us what level or department of government you work in, that does not allow another passport or citizenship? And why do we ask this of your sector and not the presidency? (I know the CIA has loyalty clauses that perhaps the presidency does not...)
I'd also like to see the wording in your rules list -- this may be your department's attempt to heed the Constitution's "natural born" requirement. Could someone born outside the USA work in your position?
The terms and conditions he stated are standard for obtaining a security clearance. For Top Secret the periodic re-investigation happens every 5-yrs, whereas the Secret clearance requires the re-investigation every 7-yrs (I think).
"His blue tourist passport, which he had taken across Asia, Australia and Africa as well as most of Europe, was replaced by a burgundy one that designates him an official of the U.S. government."
A Foreign Classroom for a Junior Senator http://www.chicagotribune.com/news/nationworld/chi-0509230360sep23,0,1103689.story?page=2
DoD. Just a local nub with a security clearance.