If an element is wrapped by a label, does the label require the “for” attribute?

Question

Say I have a set of radio s. I\'m not a caveman, so I know I need to associate with those s. I

Answer 1

According to the HTML5 spec - "If the for attribute is not specified, but the label element has a labelable element descendant, then the first such descendant in tree order is the label element's labeled control."

http://www.w3.org/TR/html5/forms.html#category-label

So basically, no it is not required as long as it is wrapping any of these elements: button, input (if the type attribute is not in the hidden state), keygen, meter, output, progress, select, or textarea