As an author, you can invoke Page Copy or New Page actions, however, error is thrown when you invoke any of these actions. Invoking "Page > New" shows following error :
Failed to retrieve list of available templates
Most probably related to: CMS-13416 , see also CMS-13721
CMS-13721 Author should not see the Components tab in the Experience manager for non-xpages
CMS-13416 Back-end: Fix [Page] and [Channel] menu for CMS Users that are not in role webmaster for a channel
CMS-14274 Move author menu actions to front-end code
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