Hello. I have edited the language pack to change city/town to city/state and would now like to make this field mandatory. I've scoured the boards and Google and could only find how to make custom fields mandatory (which is simple). I did find the following string but couldn't figure out if it would work or where to deploy it: $mform->addRule('City/State', $strrequired, 'required', null, 'client');
Any suggestions greatly appreciated!