Need formula to cancel conditional formatting when a date is entered in another column

[hbiglay]

I have two columns of dates where in the first column titled "Date reported Missing" if the date entered is past 30 days a conditional format highlights it red. In the next column titled "Date reported Found" when a date is entered I want the conditional format of highlighting the column "Date reported Missing" red to go away as this date indicates it as found. I need a formula for another conditional format to clear this out. I am attaching the file. Any help would be great, thanks in advance.

[Ace_XL]

Change your CF rule to

=AND($B2="",TODAY()-$A2>30)

[hbiglay]

You are so smart and awesome. It works great. Thanks. I will mark this as solved. Also, can you explain that formula to me so I can learn and understand it better.