Conditional Permissions around editing values
 

I have a population of users that can place a rate of 1.0 or greater in the
range E20:L20, if they want to enter less than 1.0 in this range, i want
there to be a popup box for a manager password to accept this rate below 1.0.
Anytime something below 1.0 is entered into these cells, this popup box
should appear and require the password.

Any suggestions on how to accomplish this?