Unless I am misunderstanding, this isn't some article, but stated in the Patriot Act.
"Strange how the definition of these forms of gold would show up under 17 pages of regulations pursuant to the Patriot Act having to do with identification of persons boarding and de-boarding aircraft and a multitude of other topics. Once you analyze the situation, it becomes obvious that these regulations were published in this manner, so as to keep the information from the general public and avoid suspicions of confiscation and the resulting objections. "