can you please update the link to the page or form you are using?

Yess, sorry. The webpage is at: work.onespace.com. Click on the "Sign Up" tab, and it should take you right to the form.

This is a bug in the site, there's nothing we can do about it.

Here's the code for the checkbox:

<div class="checkbox pull-left terms">
  <label>
    <input type="checkbox" id="termsofservice" name="termsofservice" value="">
    Accept our <span class="custom-checkboxer"></span>
  </label>
  <a href="http://www.onespace.com/terms-of-service/" target="_blank" class="small thick">
    Terms of Service
  </a>
</div>

It looks like the <input type=checkbox"> ought to be accessible, but the computed CSS style is "display:none". That effectively removes it from the page. I think this was an attempt by the author to style the checkbox while still using an input element, but unfortunately display:none is not a valid way to do this.

Note, for example, that you can't even check the box with the keyboard alone even if you're sighted. So it's not a ChromeVox bug, it's an author error.