/// <summary>
/// JMESPath expression to check if ageAtReferenceDate of policyHolder >= 18, 
/// at reference date, which is an attribute of the commonFunctional.
/// </summary>
const string cJMESPathExpression =
"(policy[].party[?entityType == 'policyHolder' && birthDate.ageAtReferenceDate(@, $.commonFunctional[0].referenceDate) >= `18`][] != `[]`)";