Marking on NCAA Floor

[Scrapper1]

Originally Posted by APG

In NCAA-W's game, there is an area called the lower defensive box. The LDB is important in determining whether the restricted area will apply. The lower defensive box has two of its borders bounded by those marks (which you guessed correctly are 3 feet from the lane).

What's the "upper" boundary of the LDB in the Women's game? In the NBA, I believe it's the bottom of the jump circle. But I didn't see a marking on the college court to indicate the "top" of the LDB.