Unset regions for specific content type
Create a hook suggestion in page preprocess and theme that page

for eg:

function yourthemename_preprocess_page(&amp;$vars) {
  if (isset($vars['node']-&gt;type)) {
    $vars['theme_hook_suggestions'][] = 'page__' . $vars['node']-&gt;type;
  }
}


Now clear the caches 
Duplicate page.tpl.php and rename it as page--specialcontenttype.tpl.php

Then, remove the &lt;?php print render($page['header']); ?&gt; etc.. from it