This seems most relevant: > In determining all policies for postal services, the Postal Service shall give the highest consideration to the requirement for the

This seems most relevant: > In determining all policies for postal services, the Postal Service shall give the highest consideration to the requirement for the most expeditious collection, transportation, and delivery of important letter mail. [1] ...but it also doesn’t seem binding. There’s enough wiggle-room in that language for important letter mail to not always be prioritised, and of course one could argue about what constitutes important letter mail, versus less important letter mail. (Is it reasonable to assume that where there is such an amount of wiggle room in such a high level policy, it was intentional, and also intended that the wiggle room should be explored? Or is this just the impact of vested interests?) [1] https://www.law.cornell.edu/uscode/text/39/101 https://www.law.cornell.edu/uscode/text/39/101