Why does this rule not appear in the UI and how can I clone it? I need to clone and modify the following rule:

commerce_checkout_order_email


However, it does not appear in the UI.

I have checked the following paths with no success:

admin/config/workflow/rules
admin/commerce/config/checkout/rules


I'm obviously missing something but I can't figure it out.

This rule is defined in this file along with 4 other rules, all of which do appear in the UI

sites/all/modules/commerce/modules/checkout/commerce_checkout.rules_defaults.inc


The thing is this rule DOES get executed properly.

Any ideas will be greatly appreciated.

By the way, I have doubled checked on TWO different drupal installations, one of which is a default commerce_kickstart distribution and the rule doesn't appear either.  It won't show up in the UI nor in the database.
I don't think it's possible to delete this Rule. Even if you delete it from the database directly, it is recreated the first time Commerce gets called (because it's in the defaults .inc file).
Are you sure it's not just disabled?
Your module directory structure is non-standard; Commerce should be in sites/all/modules/contrib.


Here's a copy of the Rule in case you need to import it again:

{ "commerce_checkout_order_email" : {
"LABEL" : "Send an order notification e-mail",
"PLUGIN" : "reaction rule",
"WEIGHT" : "4",
"OWNER" : "rules",
"TAGS" : [ "Commerce Checkout" ],
"REQUIRES" : [ "rules", "commerce_checkout" ],
"ON" : { "commerce_checkout_complete" : [  ] },
"DO" : [
  { "mail" : {
      "to" : [ "commerce-order:mail" ],
      "subject" : "Order [commerce-order:order-number] at [site:name]",
      "message" : "Thanks for your order [commerce-order:order-number] at [site:name].\u000A\u000AIf this is your first order with us, you will receive a separate e-mail with login instructions. You can view your order history with us at any time by logging into our website at:\u000A\u000A[site:login-url]\u000A\u000AYou can find the status of your current order at:\u000A\u000A[commerce-order:customer-url]\u000A\u000APlease contact us if you have any questions about your order.",
      "from" : ""
        }
      }
    ]
  }
}