Sankey said the league expects its teams this coming season to each line up a nonconference schedule which together has a three-year RPI average of 175 or better at the NCAA tournament selection time and moving in future years to 150 or better.
http://onlineathens.com/dogbytes/basketball/2016-06-01/sec-turns-former-big-east-commissioner-solutions-get-more-teams-ncaa
Since the time of that article our non-con SOS has ranked:
2020 --- 177 (Current)
2019 --- 146
2018 --- 132
2017 --- 301
2016 --- 224
That is a current 3 year avg of 151.7 and a 5 year avg of 196.0.