So I looked this up [1] and it turns out we're both wrong - you need to have had a valid medical at some time after 2016-07-14.
That date is exactly 10 years before congress passed the Basic Med law, so when basic med was new, it was "in the last 10 years", but the law pinned it to a specific date, not a specific number of years in the past.
That date is exactly 10 years before congress passed the Basic Med law, so when basic med was new, it was "in the last 10 years", but the law pinned it to a specific date, not a specific number of years in the past.
[1]: https://www.faa.gov/licenses_certificates/airmen_certificati...