Escaping chars in .htaccess

I can’t find proper list (or you need to be registered to some sort of forum or not clear list) of which chars should be escaped in .htaccess file. I found that dots don’t need to be escaped – but for me it’s irracional because they have meaning in “regex”.

For example this rewrite…

RewriteEngine On RewriteCond %{REQUEST_METHOD} POST RewriteCond %{REQUEST_URI} /index.php\/component\/users\/\?task=registration.register [NC] RewriteRule .* - [F,L] 

It has escaped all slashes which are not “beginning” but still that POST “pass through”

My question – does anyone have list which chars should be escaped?