SOUTH WILLIAMSPORT — Managers at this month's Little League World Series will be able to challenge certain calls under a revised instant replay system.

The 2-year-old system also will be expanded to include more plays, including force outs, tags on base paths, missed bases and hit batters.

Reviews were previously limited to plays that should have resulted in a dead ball, but were called otherwise by the umpire, such as questionable home runs and other close plays at the outfield fence.

Little League announced the latest guidelines Monday. Umpires will still have the option to call for a replay, though managers will now be allowed to challenge calls or request a replay if umpires don't ask for one.

The World Series starts Aug. 20.