Most Tier 1 CEX, along with numerous fiat onramps like Transak, require a legal opinion from a US lawyer that a token is not a "security" under US law before a token can be listed.
Sometimes the legal opinion requirement is necessary to list at all. In other instances, the legal opinion is needed so the listing is available to US customers.
Legal Kornet is a company that works with one or more US lawyers to provide these kinds of opinion. According to their website:
"The Legal Opinion prepared by our company Legal Kornet is signed by a licensed U.S. attorney. Our Legal Opinion is accepted by all cryptocurrency exchanges, including Binance — one of the largest international online digital currency exchange services."
You can review their site here: https://legal-kornet.com/services/blockchain-ico-sto-ieo/legal-opinion-howey-test/
The DAO should authorize the expenditure of marketing funds to obtain the legal opinion given that it is a prerequisite to the project's ability to list on high quality Tier 1 CEX and other fiat on/off ramps.