OK I think I may be on the track of figuring out the code on these plates.

Here's a link about Federal license plate codes from 2012 http://www.acq.osd.mil/pepolicy/pdfs/FdFlt2012Plates.pdf

Here is a document showing the abbreviations used on Federal plates. Apparently EC refers to "US Enrichment Corporation".

Here is more on Federal license plates http://www.dcplates.net/Federal.htm

Here is a Wikipedia listing on US Enrichment Corp... very interesting stuff... https://en.wikipedia.org/wiki/United_States_Enrichment_Corporation

What the hell is someone working for this uranium agency doing parked at James Alefantis' "museum"?