DOMESTIC PARTNER shall mean a person who is neither married nor related by blood or marriage to the employee; it is the employee's sole spousal equivalent; lives together with the employee in the same residence and intends to do so indefinitely; is responsible with the employee for each other's welfare.  A domestic partner relationship may be demonstrated by any three of the following types of documentation:  a) a joint mortgage or lease; b) designation of the domestic partner as beneficiary for life insurance; c) designation of the domestic partner as primary beneficiary in the employee's will; d) domestic partnership agreement; e) powers of attorney for property and/or health care; and f) joint ownership of either a motor vehicle, checking account or credit account.