Rule question from coach

[Scrapper1]

I was invited to speak at the regional high school coaches' meeting recently to give them a brief synopsis of this year's rule changes and POEs. It went very smoothly and I even got some questions.

This morning I got an email asking if the new violation for entering the free throw semi-circle refers to where the free throw shooter stands to attempt the free throw, or to the dotted semi-circle in the free throw lane.

I'm not trying to make fun of this coach, because I give him a lot of credit for following up to make sure he understands the rule. But how long has it been since the dotted jump circle around the free throw line was used in a high school game?

I'm sure he asked only because he sees it on TV in NBA games. But I honestly don't even know when it was used in basketball. It has to have disappeared like 30 years ago, right?