Radio button required vs optional {HELP}

I have two button:

one is required and one is optional. How can do that pre way only send the form if select required ones? if select optional not send?

http://jsfiddle.net/xLju9f5d/
When select not required ones also send the form

any idea is well appreciated! i want to make a terms of service to agree so thats why ask this radio buttonif select optional do nothing about form send.