BEST: A single best quote, where Nexus will select the FX provider which currently offers the best FX rate. A QuoteID is provided, which the Source Bank must reference when it sends the final payment instruction. (In the case that multiple FX Providers offer the exact same rate, a list is provided, including QuoteIDs for all providers. It is then up to the Source Bank to select one of the FX Providers by using that specific QuoteID in the payment.)