This post seems to be older than 1 year— so keep that in mind while reading. It might be outdated.
USPS says the MOU-(DPS-Flats-Vehicle-8-11-2014) to allow routes with USPS provided vehicles to case DPS flats is terminated. They claim they have fulfilled their obligation to put 15000 RHD Employer provided vehicles on rural routes and they will instruct carriers with Employer provided vehicles to cease casing and strapping out DPS flats on March 30th, 2015. Below is the letter notifying the NRLCA that the August 2014 MOU is terminated.