Multiple Validations per Cell?

Is there a way to have a cell check for multiple validations?

Example:

First = A validation that makes sure that another cell has the number 4.
AND
Second = A validation that requires them to enter a valid time in the cell.

I can get both of these working seperately but how do I get them to work on the same cell at the same time?

This is what I have so far

=AND(P4=4,????)

The ???? needs to have a condition of a valid timed event such as "it took 12:00 minutes to run the report". So I want them ONLY to be able to put in 12:45 and not 1245 or 12 or 45.

I think you helped me on my other time issue, where I needed time to be something timed and not a time of day. This is for the same sheet.

By the way thank you so much for your prior help, it works great now!!!!!

Ken

I am back working on this spreadsheet and your suggestion work great.

Thanks!
Ken