My brain is misfiring, I fear. I was referring to actual band numbers, like Band 41kDa or Band 18 kDa or Band 39 kDa etc. CDC protocol calls for two IgM bands to be positive - but this must occur more or less within 60 days of being infected. After that, IgG values rule, and then according to the CDC you must demonstrate five of 10 bands positive. But this is specific to the U.S. and to Bb sensu stricto. Band requirements can differ depending on country, and, I think, species. (Not sure about the species requirements)
I mention the desire for SPECIFIC bands because some are specific to Bb, and even though someone may not have five bands IgG, but say only two or three IgG positive, some may feel confident to diagnose as Lyme.