" Our outside counsel is stating we are in violation of BSA because our still drafted BSA Policy is not board-approved."
Since you are paying them and they have made such a claim, it should not be a problem for them to provide you with a citation to support that statement.
By the way, they won't find one for MSB operations.
If you are not already, you want to get familiar with this document. It probably has the most MSB materials in it regarding FinCEN expectations for MSBs. Some of the expectations regarding senior management or the board of an MSB can be found starting around page 55. Not every MSB has a Board is one reason it is not a requirement carved in stone, like at a financial institution.
http://www.fincen.gov/news_room/rp/files/MSB_Exam_Manual.pdf