"10em"
                                class="text-center"
                                headerText="Accept At">
                                <h:outputText value="#{bp.backwardReferenceBill.createdAt}" >
                                    <f:convertDateTime pattern="#{sessionController.applicationPreference.shortDateTimeFormat}" ></f:convertDateTime>
                                </h:outputText>
                            </p:column>

                            <p:column 
                         