Russians have been doing expedited four-orbit rendezvous with the International Space Station (ISS) for quite a while now, and when it works, its benefits are apparent; You get there before you'd even have to relieve bladder again, which, in a crowded Soyuz spacecraft, should be a lot more important than anyone riding it is ready to publicly admit. But there are other benefits, too. Including for live cargo on Progress, any other time-sensitive or urgently needed equipment and goods, less time to fret any risk management nightmare or otherwise things going wrong on orbit, and it doesn't hurt that mission controllers get to go home sooner either, have everyone rested and avoid human error.
In the meantime, all the past and current US cargo and human crew providers, including NASA's Space Shuttle Orbiter, SpaceX's Dragon, Orbital ATK's Orion,... did/do the standard, about two and a half days, or roughly 40 orbits long rendezvous, just like when Soyuz or Progress spacecraft fail to insert into their ISS chasing orbit precisely enough, or something else needed to accomplish it fails (like failing to deploy KURS antennas or alike). So to my question;
Does NASA require in any version of their COTS (Commercial Orbital Transportation Services) contracts that some, or all providers have to reach capability of expedited rendezvous? Or, if that isn't the case, did any of the current providers, or future contract competitors announce such capability?
I realize that doing expedited rendezvous might require phase corrections of ISS' orbit, but that's what Russians have been doing so far without any problems that I'm aware of. Could US do the same?