I have a site where I want to have the list of available page types to be limited for any CMS users not in the Administrators group. My testing shows that setting:

static $can_create = false;

on a page type removes the page from both Administration and other users.

I found

static $need_permission

but cannot find documentation on how it works.

Also I found:

	// a list of groups that are permitted to create pages of this type.
	/*static $can_create = array(
		'Administrators'
	);*/

However putting this code, uncommented in my page type declaration doesn't make any difference.

I would like to limit page creation of all types to only Administrators in the SiteTree class and then allow certain pages to be created by Writers group memebers by setting the $can_create to true in my page types.