jQuery Validator Unbinding

Estou usando ojQuery Validator. E eu estou tentando descobrir:Como posso desanexar o validador do meu formulário depois de enviado?

$(function() {
  // Just the rules, etc...
  validator = $("#sweepstakesForm").validate({rules: {fname: {required: true,minlength: 2,maxlength: 50},lname: {required: true,minlength: 2,maxlength: 50},email: {email: true,remote: "?c=home&m=jsHook&param=email&nojson=1",required: true,minlength: 6,maxlength: 120},address: {required: true,minlength: 5,maxlength: 100},state_0: {required: true},state:  ); // etc ...

  $('#sweepstakesForm').submit() {

  }
});

Tentei estes sem sucesso:

validator = null;
$("#sweepstakesForm").unbind('validate');
delete validator;

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