Every year or so, the U.S. Postal Service changes the standard Terms and Conditions that apply to its newly awarded Highway Contract Route (HCR) and Contract Delivery Service (CDS) contacts. When this occurs, the new terms only apply to newly awarded contracts–existing contracts are unaffected and retain the same terms as when awarded.

But this year, the Postal Service has sought to apply new Terms and Conditions to existing CDS contracts as well as newly awarded ones. In an email to its CDS contractors, the Postal Service asked them to sign, without any “alterations or additions,” a contract modification that incorporated the new terms. If the contractor did not so, the Postal Service’s email threatened contract termination:

“Because of the Postal Service’s interest in maintaining consistency across its many CDS contracts, please note that a failure to respond to this correspondence … may lead the Postal Service to consider termination of the subject contract.”

After receiving this email, many contractors asked me: “Can the Postal Service really do this?” In my opinion, several legal arguments, if upheld, would make the resulting modification unenforceable. For example, the modification might fail for lack of consideration, because it gave the Postal Service what it wanted without giving anything that contractors valued in return. And it might fail for violation of the implied covenant of good faith and fair dealing, because it seeks to recapture benefits that were foreclosed at the time of contract award. But I think the best argument against its enforceability is based on the legal theory of coercion and duress. Normally, this is a difficult argument to make, but here the elements seem apparent from the Postal Service’s email itself.

The U.S. Postal Service spends about $3 billion per year to move the mail by truck and does so under a special type of contract called a Highway Contract Route (HCR) contract. These contracts have unique contract clauses, and even their own lingo. For example, an HCR “amendment” is what the rest of the government contracting world would call a contract “modification.”

One of the biggest differences between HCR contracts and other government contracts is the Changes clause. Under an HCR contract, the contracting officer has limited ability to direct unilateral changes. The CO may only issue a unilateral change, called a “minor service change,” if the price impact would be $5,000 or less. Under a Contract Delivery Service (CDS) contract – a subset of HCR contracts for mailbox deliveries – unilateral changes must be $2,500 or less. Even for these changes, a contractor who disagrees with the CO’s determination may file a claim for additional compensation.

In addition to these monetary thresholds, unilateral changes are further restricted to certain types of changes. The only unilateral changes a CO can direct are an extension, a curtailment, a change in line of travel, a revision of route, and an increase or decrease in frequency of service or number of trips. The CO has no authority to unilaterally direct any other change, even if the price impact would be $5,000 or less. For example, the contracting officer may not unilaterally direct a contractor to change equipment or buy new equipment.