Conditional Questions and Price Level

[srshuster]

My organization currently has a registration form that allows employees to enter a department code if their manager has approved of covering the cost of an event for an employee.

Right now, that is set up as its own price level, and then the employee enters the department code into a text box.

However, the issue we run into is that that text box cannot be made required because the other price levels do not require this information. This means that we have employees that select that price level, then don't enter the department code. 

Is it possible to set up a conditional question based off a price level?

For example, if anyone selects the department code price level, then a required text box to enter the code pops up.