Is there a way to determine the eligible modifier for an order line before the pricing phase?

Hi Everyone,

We got a requirement to stop the booking event for a SO line if the freight term is not populated. This seems pretty simple, but in our business, we populate the freight term at the booking event only. There is a promotion type modifier which populates the freight term at the Book event.

We've tried form personalization pre-book and post-book events without achieving the desired result. So, now we are trying to simulate the pricing engine call and determine if any modifier of this special type is eligible for this line or not at the pre book event and take the decision based on the result.