What conditions must be met for a defendant to successfully use the nominative fair use defense?

Nominative fair use is a defense often employed by the defendant in a trademark infringement case where a defendant uses a plaintiff's mark to identify the plaintiff's products or services in conjunction with its own products or services. To successfully employ this defense, the defendant must show three things:
1) The plaintiff's product or service cannot be readily identifiable without using the plaintiff's mark.
2) It uses only as much of plaintiff's mark as necessary to identify the defendant's product or service.
3) The defendant does nothing with the plaintiff's mark that suggests endorsement or sponsorship by the
plaintiff.