I found a USMC document titled "Marine Field Feeding Program"
http://www.marines.mil/Portals/59/Publi ... 142108-363
and in it there was this snippet:
Note: All requests for UGR-Es must go through MCICOM G-4 for approval

To save the inevitable googling, that stands for Marine Corps Installations Command, G-4 (logistics)
Also of interest in the document
Note: MCFFP family of combat rations are
not intended for or authorized for humanitarian
feeding