There is no time frame for a person to be categorised as living in a de facto or interdependent relationship expressed by definition under the Superannuation Industry (Supervision) Act 1993 (Cth) (‘SISA’). In the 1996 Superannuation Complaints Tribunal (‘SCT’) determination RM95-96/22, the trustee resolved to pay 100% of the policy to the deceased’s girlfriend rather than paying the assets into the hands of the legal personal representative. The family alleged that they had only commenced a boyfriend-girlfriend relationship over a period of 6 weeks and could therefore not be considered as interdependent. The estate’s claim was unsuccessful. In the 2009 SCT determination D09-10\023, the fund trustee resolved to pay a death benefit equally between the deceased’s mother, father and brother. The complainant alleged that she was in a relationship with the deceased and had cohabited for a period of eleven months. Based on their finding that there had been eleven months of cohabitation the Tribunal reversed the decision of the Trustee and paid the money 100% to the deceased’s girlfriend. This is starkly different from the position of s15 of the Administration Act 1903 (WA) which requires a two-year relationship to inherit under intestacy (where there is no will).