PMD/CPD: Ignore bits of code using comments

Is there a way to tell PMD to ignore checking parts of code for duplication?

For example, can I do something like this:

// CPD-Ignore-On
...
// CPD-Ignore-Off

Currently I have PMD set up like this using Maven, but don't see any arguments that would like me do what I want unless I am missing something.

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-pmd-plugin</artifactId>
            <version>2.5</version>
            <configuration>
                <minimumTokens>40</minimumTokens>
                <targetJdk>1.5</targetJdk>
                <ignoreIdentifiers>true</ignoreIdentifiers>
                <ignoreLiterals>true</ignoreLiterals>
            </configuration>
        </plugin>