[jQuery] (validate) Can rules be turned off by setting them to false?

[Mike817]

I'm trying to use a checkbox to turn a validation rule off or on. The
rules I'm using is:

MyField: {
        required: "#MyCheckbox:unchecked",
        number: "#MyCheckbox:unchecked"
}

The required rule turns off fine, but the number rule stays on.  Is
there anyway to make this work?