Most bait shops now a days get them from out of state dealers, some different people I know that sell minnows locally, one depending on the year nets his minnows from the lake then sells them but tells his customers they are only technically legal for that lake since they aren't certified, another one nets his minnows also from ponds and strems creeks locally sends the alloted amount to the state to test then that allows him to sell them with bait slip as certified bait to use wherever your fishing instate or to other baitshops