Use the following code to set the maximum benefit amount, based on a person's age.
var effective = DateTime.Now;
var dob = Event.Employee.EmployeePerson.DOB;
var age = effective.Year - dob.Year;
if (dob.Month > effective.Month || dob.Month == effective.Month && dob.Day > effective.Day)
age--;
if (age > 69) {
Event.Config.MaxBenefitAmount = '50000';
}