The form on the left has some disabled inputs. The form on the right has the same inputs disabled, plus each of those disabled inputs' corresponding label has a class of "disabled", which is styled to be light gray in color. Particularly with the checkbox fieldset, it is much easier to tell at a glance which fields are in the disabled state.

Form 1

Name and Contact
In the name of science

Form 2

Name and Contact
In the name of science