In http://docs.oracle.com/javase/7/docs/technotes/tools/share/pack200.html, consider the text for these four options:

-Cattribute-name=layout --class-attribute=attribute-name=action
-Fattribute-name=layout --field-attribute=attribute-name=action
-Mattribute-name=layout --method-attribute=attribute-name=action
-Dattribute-name=layout --code-attribute=attribute-name=action

The text says the possible values for action are:

some-layout-string
error
strip

However, the text then uses "pass" as a value for action:

"Example: --class-attribute=CompilationID=pass will cause the class file containing this attribute to be passed through without further action by the packer."