ji20874,
I have to respectfully disagree with part of what you said. We work very closely with our contractors, due to the nature of our mission. So with issues like these, we don't just say "submit it in an invoice and we'll see". We routinely include language in our contracts that direct contractors to submit authorization requests for travel (especially if it's international). We do this to ensure situations like these are handled with care upfront, so that issues don't come up after the fact. Additionally, legal advice is just that, advice/opinion; however, we also have close relationships with our OGC, and feel comfortable bringing up references such as what H2H provided. We have a lot of respect for our OGC, but I trust they don't know the FAR word-for-word...sometimes it takes a reminder. :-)