I was actually able to restrict access to a page using this:
if ( !( $logged['admin'] = member_auth( 1, false ) ) )
if ( !( $logged['member'] = member_auth( 0, true ) ) )
if ( !( $logged['aff'] = member_auth( 2, false )) )
$logged['moderator'] = member_auth( 3, false );
I found in my MySql database that membership Levels I create are
assigned an ID number in "MemLevels". Would anyone be able to tell me how
to restrict someone access to a page with 'MemLevel' equal to 7?