They're not available on the Layout ribbon tab and all the panels that are available are visible:
This menu isn't loaded by default when you install AutoCAD Mechanical but it can be manually added to the Layout ribbon tab.
Use the CUILOAD command to load the ModelDoc.cuix.
The ModelDoc.cuix file is located in C:\Users\user_login_name\AppData\Roaming\Autodesk\AutoCAD Mechanical 2013 - English\R19.0\enu\Support by default.
Select the ModelDoc.cuix file and load it.
Once it's loaded you should see the Create View, Modify View, Update and Styles and Standards panels on the Layout ribbon.