Do I need to check if User has required capability?

#newbie #firstplugin #forgivemeplease

The plugin I am (trying) writing inserts custom text into the footer of twentyeleven.

My first question is, do I need to check if a User has the required capability since add_submenu_page takes manage_options as a parameter?

//  Add this plugin to the Admin Navigation Menu ( register the function )
        add_action('admin_menu', 'register_my_plugin_submenu_page');   

//  Create a function that contains the admin menu-building code
//  This adds the plugin to the Admin Navigation Menu
        function register_my_plugin_submenu_page() {
        // Create Plugins submenu item
                add_submenu_page(
                        'plugins.php',
                        'TnT Custom Text Configuration',
                        'TnT Custom Text',
                        'manage_options',
                        'tnt-custom-text',
                        'create_the_admin_html_output');
                }

And if I do need to check User Capability, is this the “best” way to do it?

// Create the function the displays the HTML for the plugin submenu in the Admin panel
		function create_the_admin_html_output() {

//must check that the user has the required capability
    if (!current_user_can('manage_options'))
    {
      wp_die( __('You do not have sufficient permissions to access this page.') );
    }
.
.
.
}

Thank you for any help!

[No bumping, thank you.]