Making date of birth mandatory for dependents only

Summary:

Hello!

We are facing a challenge at our organization where team members do not enter date of births for themselves or dependents they want covered under our insurance plans.

This then creates downstream issues when trying to send files to our insurance vendors.

Question - Can we make the date of birth and even SSN mandatory for dependents only? We've been told that we can make those fields mandatory/required but it would also make them mandatory/required for contacts as well. We don't want that field to be mandatory/required field for contacts just dependents covered under our insurance plans.