DL1 and union houses

I was just wondering if anyone had run into any issues with the DL1 and being in a union house. There has been much discussion here at the shop as to which union would handle such a fixture, i.e. stagehands, projectionists, or broadcast engineers. The issue has come up a few times durring preproduction meetings with a few clients and there is such a grey area that we didn't have an answer.

Thanks Much,

Tom Huston