@@ -, +, @@ 
    Add changes proposed in Bug 54758
--- a/src/java/org/apache/poi/hssf/usermodel/HSSFConditionalFormattingRule.java	
+++ a/src/java/org/apache/poi/hssf/usermodel/HSSFConditionalFormattingRule.java	
@@ -208,4 +208,20 @@ public final class HSSFConditionalFormattingRule implements ConditionalFormattin
 		}
 		return HSSFFormulaParser.toFormulaString(workbook, parsedExpression);
 	}
+
+	/**
+     * Sets the "stopIfTrue" attribute
+     */
+    @Override
+    public void setStopIfTrue(boolean bln) {
+        throw new UnsupportedOperationException("StopIfTrue is not supported for HSSF yet.");
+    }
+
+    /**
+     * Unsets the "stopIfTrue" attribute
+     */
+    @Override
+    public void unsetStopIfTrue() {
+        throw new UnsupportedOperationException("StopIfTrue is not supported for HSSF yet.");
+    }
 }
--- a/src/java/org/apache/poi/ss/usermodel/ConditionalFormattingRule.java	
+++ a/src/java/org/apache/poi/ss/usermodel/ConditionalFormattingRule.java	
@@ -122,4 +122,14 @@ public interface ConditionalFormattingRule {
      * @return  the second formula
      */
     String getFormula2();
+
+    /**
+     * Sets the "stopIfTrue" attribute
+     */
+    public void setStopIfTrue(boolean bln);
+
+    /**
+     * Unsets the "stopIfTrue" attribute
+     */
+    public void unsetStopIfTrue();
 }
--- a/src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFConditionalFormattingRule.java	
+++ a/src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFConditionalFormattingRule.java	
@@ -221,4 +221,20 @@ public class XSSFConditionalFormattingRule implements ConditionalFormattingRule
     public String getFormula2(){
         return _cfRule.sizeOfFormulaArray() == 2 ? _cfRule.getFormulaArray(1) : null;
     }
+
+    /**
+     * Sets the "stopIfTrue" attribute
+     */
+    @Override
+    public void setStopIfTrue(boolean bln) {
+        _cfRule.setStopIfTrue(bln);
+    }
+
+    /**
+     * Unsets the "stopIfTrue" attribute
+     */
+    @Override
+    public void unsetStopIfTrue() {
+        _cfRule.unsetStopIfTrue();
+    }
 }
--- a/src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFConditionalFormatting.java	
+++ a/src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFConditionalFormatting.java	
@@ -19,6 +19,11 @@ 
 package org.apache.poi.xssf.usermodel;
 
 import org.apache.poi.ss.usermodel.BaseTestConditionalFormatting;
+import org.apache.poi.ss.usermodel.ConditionalFormatting;
+import org.apache.poi.ss.usermodel.ConditionalFormattingRule;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.usermodel.SheetConditionalFormatting;
+import org.apache.poi.ss.usermodel.Workbook;
 import org.apache.poi.xssf.XSSFITestDataProvider;
 
 /**
@@ -32,4 +37,18 @@ public class TestXSSFConditionalFormatting extends BaseTestConditionalFormatting
     public void testRead(){
         testRead("WithConditionalFormatting.xlsx");
     }
+    
+    public void testStopIfTrue() {
+        Workbook wb = XSSFITestDataProvider.instance.openSampleWorkbook("WithConditionalFormatting.xlsx");
+        Sheet sh = wb.getSheet("CF");
+        SheetConditionalFormatting sheetCF = sh.getSheetConditionalFormatting();
+        assertEquals(3, sheetCF.getNumConditionalFormattings());
+
+        ConditionalFormatting cf1 = sheetCF.getConditionalFormattingAt(0);
+        ConditionalFormattingRule rule1 = cf1.getRule(0);
+
+        rule1.setStopIfTrue(true);
+        rule1.setStopIfTrue(false);
+        rule1.unsetStopIfTrue();
+    }
 }
--- a/src/testcases/org/apache/poi/hssf/usermodel/TestHSSFConditionalFormatting.java	
+++ a/src/testcases/org/apache/poi/hssf/usermodel/TestHSSFConditionalFormatting.java	
@@ -20,6 +20,12 @@ package org.apache.poi.hssf.usermodel;
 
 import org.apache.poi.hssf.HSSFITestDataProvider;
 import org.apache.poi.ss.usermodel.BaseTestConditionalFormatting;
+import org.apache.poi.ss.usermodel.ConditionalFormatting;
+import org.apache.poi.ss.usermodel.ConditionalFormattingRule;
+import org.apache.poi.ss.usermodel.Sheet;
+import org.apache.poi.ss.usermodel.SheetConditionalFormatting;
+import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.xssf.XSSFITestDataProvider;
 
 /**
  *
@@ -33,4 +39,30 @@ public final class TestHSSFConditionalFormatting extends BaseTestConditionalForm
     public void testRead(){
         testRead("WithConditionalFormatting.xls");
     }
+    
+    public void testStopIfTrue() {
+        Workbook wb = HSSFITestDataProvider.instance.openSampleWorkbook("WithConditionalFormatting.xls");
+        Sheet sh = wb.getSheet("CF");
+        SheetConditionalFormatting sheetCF = sh.getSheetConditionalFormatting();
+        assertEquals(3, sheetCF.getNumConditionalFormattings());
+
+        ConditionalFormatting cf1 = sheetCF.getConditionalFormattingAt(0);
+        ConditionalFormattingRule rule1 = cf1.getRule(0);
+
+        try {
+	        rule1.setStopIfTrue(true);
+	        fail("Should not be supported yet");
+        } catch (UnsupportedOperationException e) {
+        }
+        try {
+	        rule1.setStopIfTrue(false);
+	        fail("Should not be supported yet");
+        } catch (UnsupportedOperationException e) {
+        }
+        try {
+	        rule1.unsetStopIfTrue();
+	        fail("Should not be supported yet");
+        } catch (UnsupportedOperationException e) {
+        }
+    }
 }