Хитрая выборка элементов с помощью ORM

"filter" => array(
    ">DATE_UPDATE" => \Bitrix\Main\Type\DateTime::createFromTimestamp(strtotime("-7 days"))
),

"filter" => array(
    "<DATE_UPDATE" => \Bitrix\Main\Type\DateTime::createFromTimestamp(strtotime("-7 days"))
),

"order" => array(
    "DATE_UPDATE" => "DESC",
    "ID" => "DESC"
),

"offset" => $nav->getOffset() + $nav->getLimit()

while ($arOrder = $dbOrders->fetch()) {
    if ($arOrder['PROP_DATE'] > \Bitrix\Main\Type\DateTime::createFromTimestamp(strtotime("-1 year"))) {
        echo "Актуально";
    } else {
        echo "Не фига неактуально";
    }
}

$arOrders = array();
while ($arOrder = $dbOrders->fetch()) {
    if (
        $arOrder['PROP_DATE'] instanceof \Bitrix\Main\Type\DateTime &&
        $arOrder['PROP_DATE'] > \Bitrix\Main\Type\DateTime::createFromTimestamp(strtotime("-1 year"))
    ) {
        $arOrder["RELEVANT"] = true;
    } else {
        $arOrder["RELEVANT"] = false;
    }
    $arOrders[$arOrder['ID']] = $arOrder;
}

$arOrdersRelevant = array();
$arOrdersIrrelevant = array();
$datetimeLangoliers = \Bitrix\Main\Type\DateTime::createFromTimestamp(strtotime("-1 year"));
while ($arOrder = $dbOrders->fetch()) {
    if (
        !empty($arOrder['PROP_DATE']) &&
        $arOrder['PROP_DATE'] instanceof \Bitrix\Main\Type\DateTime &&
        $arOrder['PROP_DATE'] > $datetimeLangoliers
    ) {
        $arOrdersRelevant[$arOrder['ID']] = $arOrder;
    } else {
        $arOrdersIrrelevant[$arOrder['ID']] = $arOrder;
    }
}

$dbOrders = \Stdl\Orders\OrdersTable::getList(
    array(
        "order" => array(
            "RELEVANT_ORDER" => "DESC",
            "ID" => "DESC"
        ),
        "select" => array(
            "*"
        ),
        "offset" => $nav->getOffset(),
        "limit" => $nav->getLimit(),
        "runtime" => array(
            new Entity\ExpressionField(
                "RELEVANT_ORDER",
                "PROP_DATE >= DATE_SUB(NOW(), INTERVAL 1 MONTH)"
            )
        )
    )
);