diff --git a/components/ILIAS/OrgUnit/OrgUnit.php b/components/ILIAS/OrgUnit/OrgUnit.php
index b65df02e25d1..81da6b2e9520 100644
--- a/components/ILIAS/OrgUnit/OrgUnit.php
+++ b/components/ILIAS/OrgUnit/OrgUnit.php
@@ -38,5 +38,7 @@ public function init(
             );
         $contribute[Component\Resource\PublicAsset::class] = fn() =>
             new Component\Resource\ComponentJS($this, "authority.js");
+        $contribute[Component\Resource\PublicAsset::class] = fn() =>
+            new Component\Resource\ComponentJS($this, "position_multi_line_input.js");
     }
 }
diff --git a/components/ILIAS/OrgUnit/classes/Positions/Authorities/class.ilOrgUnitGenericMultiInputGUI.php b/components/ILIAS/OrgUnit/classes/Positions/Authorities/class.ilOrgUnitGenericMultiInputGUI.php
index 5b69a40715b5..89d2f6964c84 100755
--- a/components/ILIAS/OrgUnit/classes/Positions/Authorities/class.ilOrgUnitGenericMultiInputGUI.php
+++ b/components/ILIAS/OrgUnit/classes/Positions/Authorities/class.ilOrgUnitGenericMultiInputGUI.php
@@ -325,7 +325,7 @@ public function render(int|string $iterator_id = 0, bool $clean_render = false):
 
     public function initCSSandJS(): void
     {
-        $this->global_tpl->addJavascript('assets/js/generic_multi_line_input.js');
+        $this->global_tpl->addJavascript('assets/js/position_multi_line_input.js');
     }
 
     /**
@@ -364,19 +364,9 @@ public function insert(\ilTemplate $a_tpl): void
         }
         if ($this->getMulti()) {
             $output = "<div style=\"display:none;\" id='{$this->getFieldId()}' class='multi_line_input'>{$output}</div>";
-            $config = json_encode($this->input_options);
-            $options = json_encode([
-                'limit' => 999999,
-                'sortable' => false,
-                'locale' => $this->lng->getLangKey()
-            ]);
             global $tpl;
-            $tpl->addOnLoadCode(
-                "
-                il.DataCollection.genericMultiLineInit('{$this->getFieldId()}',$config,$options);
-                document.body.querySelector('#{$this->getFieldId()}').removeAttribute('style');
-            "
-            );
+            $fieldId = $this->getFieldId();
+            $tpl->addOnLoadCode("il.OrgUnit.positionMultiLineInit('{$fieldId}');");
         }
 
         $a_tpl->setCurrentBlock("prop_generic");
diff --git a/components/ILIAS/OrgUnit/resources/position_multi_line_input.js b/components/ILIAS/OrgUnit/resources/position_multi_line_input.js
new file mode 100644
index 000000000000..9770cfdc07d4
--- /dev/null
+++ b/components/ILIAS/OrgUnit/resources/position_multi_line_input.js
@@ -0,0 +1,197 @@
+/**
+ * This file is part of ILIAS, a powerful learning management system
+ * published by ILIAS open source e-Learning e.V.
+ *
+ * ILIAS is licensed with the GPL-3.0,
+ * see https://www.gnu.org/licenses/gpl-3.0.en.html
+ * You should have received a copy of said license along with the
+ * source code, too.
+ *
+ * If this is not the case or you just want to try ILIAS, you'll find
+ * us at:
+ * https://www.ilias.de
+ * https://github.com/ILIAS-eLearning
+ *
+ ******************************************************************** */
+
+/* global jQuery */
+window.il = window.il || {};
+window.il.OrgUnit = window.il.OrgUnit || {};
+
+(function (jq) {
+  /**
+   * Multi-line form rows for OrgUnit position authorities.
+   * The row with #multi_line_add_button is a prototype: no remove action, only add.
+   */
+  window.il.OrgUnit = (() => {
+    const EMPTY_ID = 'empty';
+    const MIN_LAST_CELL_WIDTH = 150;
+    const WIDTH_OFFSET = 100;
+
+    jq.fn.extend({
+      positionMultiLineInit() {
+        const element = this;
+        let counter = 0;
+        const cloneTemplate = jq(this).find('.multi_input_line').first();
+
+        const isStandaloneAddLine = (line) => jq(line).find('#multi_line_add_button').length > 0;
+
+        /**
+         * Authority rows only (not the standalone “add first row” prototype).
+         * Do not use :visible — on first paint the wrapper may still be display:none
+         * until the next onLoad statement runs, which would hide every nested row from :visible.
+         */
+        const getAuthorityLines = () => jq(element)
+          .find('.multi_input_line')
+          .filter((__, el) => !isStandaloneAddLine(el));
+
+        const setPrototypeRemoveVisibility = (standaloneAddButton) => {
+          if (standaloneAddButton.length === 0) {
+            return;
+          }
+          const prototypeRow = standaloneAddButton.closest('.multi_input_line');
+          prototypeRow.find('.remove_button').hide();
+        };
+
+        const updatePrototypeVisibility = () => {
+          const standaloneAddButton = jq(element).find('#multi_line_add_button');
+          if (standaloneAddButton.length > 0) {
+            const standaloneLine = standaloneAddButton.closest('.multi_input_line');
+            if (getAuthorityLines().length === 0) {
+              standaloneLine.show();
+              standaloneAddButton.show();
+            } else {
+              standaloneAddButton.hide();
+              standaloneLine.hide();
+            }
+            setPrototypeRemoveVisibility(standaloneAddButton);
+          }
+        };
+
+        const calcWidth = (row) => {
+          if (row.find('.ml-input').length === 0) {
+            return;
+          }
+          const iconsWidth = row.find('.multi_icons_wrapper').last().width() || 0;
+          let sumWidths = iconsWidth;
+          row.find('.ml-input').each((_, inputCell) => {
+            sumWidths += jq(inputCell).width() || 0;
+          });
+          const lastInputWidth = row.find('.ml-input').last().width() || 0;
+          const usedWidth = sumWidths - lastInputWidth;
+          const remainingWidth = (row.width() || 0) - usedWidth - WIDTH_OFFSET;
+          const lastCell = row.find('.ml-input').last();
+          if (remainingWidth > MIN_LAST_CELL_WIDTH) {
+            lastCell.width(remainingWidth);
+          } else {
+            lastCell.css('width', '');
+          }
+        };
+
+        jq(this).find('.multi_input_line').each((_, el) => {
+          calcWidth(jq(el));
+        });
+
+        const setupCloneLine = (template) => {
+          template.hide();
+          template.removeClass('multi_input_line');
+          const fieldId = element.attr('id') || '';
+          const nameSelector = `textarea[name^='${fieldId}'], input[name^='${fieldId}'], select[name^='${fieldId}']`;
+          template.find(nameSelector).each((_, inputEl) => {
+            const input = jq(inputEl);
+            const name = input.attr('name');
+            const regex = new RegExp(`^${fieldId}\\[[0-9]+\\](.*)$`);
+            const matches = regex.exec(name);
+            if (!matches) {
+              return;
+            }
+            input.attr('name', `${EMPTY_ID}[${counter}]${matches[1]}`);
+          });
+        };
+
+        setupCloneLine(cloneTemplate);
+
+        const setupLine = (line, isInit = false) => {
+          const $line = line;
+
+          jq(line).find('.add_button').on('click', () => {
+            const newLine = cloneTemplate.clone();
+            newLine.show();
+            newLine.addClass('multi_input_line');
+            setupLine(newLine);
+            jq(element).append(newLine);
+            calcWidth(newLine);
+            jq(element).trigger('change');
+            jq(document).trigger('multi_line_add_button', [$line, newLine]);
+            jq(element).find("textarea, input[type='text']").last().focus();
+            updatePrototypeVisibility();
+            return false;
+          });
+
+          jq(line).find('.remove_button').on('click', () => {
+            if (isStandaloneAddLine(line)) {
+              return false;
+            }
+            $line.remove();
+            updatePrototypeVisibility();
+            jq(element).trigger('change');
+            jq(document).trigger('multi_line_remove_button', $line);
+            return false;
+          });
+
+          if (!isInit) {
+            const fieldId = element.attr('id') || '';
+            const cloneSelector = (
+              `textarea[name^='${EMPTY_ID}'], input[name^='${EMPTY_ID}'], `
+              + `select[name^='${EMPTY_ID}']`
+            );
+            $line.find(cloneSelector).each((_, inputEl) => {
+              const input = jq(inputEl);
+              const rawName = input.attr('name');
+              input.val('');
+              const regex = new RegExp(`^${EMPTY_ID}\\[[0-9]+\\](.*)$`);
+              const matches = regex.exec(rawName);
+              if (!matches) {
+                return;
+              }
+              const suffix = matches[1];
+              let idx = counter;
+              let candidate = `${fieldId}[${idx}]${suffix}`;
+              const isNameTaken = (n) => jq('input, select, textarea')
+                .filter((__, el) => el.getAttribute('name') === n).length > 0;
+              while (isNameTaken(candidate)) {
+                idx += 1;
+                candidate = `${fieldId}[${idx}]${suffix}`;
+              }
+              input.attr('name', candidate);
+            });
+          }
+          counter += 1;
+        };
+
+        jq(this).find('.multi_input_line').each((_, el) => {
+          setupLine(jq(el), true);
+        });
+        updatePrototypeVisibility();
+        jq(element).trigger('change');
+
+        return element;
+      },
+    });
+
+    const positionMultiLineInit = (id) => {
+      const root = document.getElementById(id);
+      if (!root) {
+        return;
+      }
+      jq(root).positionMultiLineInit();
+      // PHP outputs the wrapper hidden (display:none) until init runs; avoids a flash
+      // of the clone row before setupCloneLine hides it.
+      root.removeAttribute('style');
+    };
+
+    return {
+      positionMultiLineInit,
+    };
+  })();
+}(jQuery));
diff --git a/components/ILIAS/OrgUnit/templates/default/tpl.prop_generic_multi_line.html b/components/ILIAS/OrgUnit/templates/default/tpl.prop_generic_multi_line.html
index cbf6fb83f7c5..88a7ccd5890a 100755
--- a/components/ILIAS/OrgUnit/templates/default/tpl.prop_generic_multi_line.html
+++ b/components/ILIAS/OrgUnit/templates/default/tpl.prop_generic_multi_line.html
@@ -25,9 +25,5 @@
     {IMAGE_PLUS}
     {IMAGE_MINUS}
     <!-- END multi_icons -->
-    <!-- BEGIN multi_icons_move -->
-    {IMAGE_UP}
-    {IMAGE_DOWN}
-    <!-- END multi_icons_move -->
 </div>
 </div>