VERIFIED SOLUTION i

How to know the June 2017 MailStream Plus Postal Reference Files have the updated USPS June L007 data

MailStream Plus 8.3.3, all platforms
 
The USPS needed to make corrections to the original L007 Labeling List in the June 2017 data.  This was corrected around June 6.

The MailStream Plus June 2017 PRFs that were released around June 12 do contain the corrected data.
UPDATED:  June 13, 2017