I found if i changed the parent class to type ANY[] it would add what i need. See commented code below.
public partial class POCD_MT000040SubstanceAdministration {
private CS[] realmCodeField;
private POCD_MT000040InfrastructureRoottypeId typeIdField;
private II[] templateIdField;
private II[] idField;
private CD codeField;
private ED textField;
private CS statusCodeField;
//private PIVL_TS[] effectiveTimeField;
private ANY[] effectiveTimeField;