What is the recommended method for Validating Date of Birth? (Redwood)

Summary:

25B documentation states that date of birth validation is now a possible use case for Defaulting and Validation, but I am unsure as to how to implement it. What we are trying to achieve is if their date of birth is not greater than or equal to 15 and younger than 100, then it should error and not be able to update the date of birth.

25B Default and Validate Field Values in HCM Redwood Applications

Content (please ensure you mask any confidential information):

I'm doing this on the Personal Details page and I see that regex is now available to use so came up with the pattern ^(1[5-9]|[2-9][0-9]). This pattern matches correctly against the data I see in the