Usufructuary Jurisprudence: Foraging Entitlements, Resource Sharing & Inter-Estate Access

1. The Concept of Usufruct in Bibbullmun Law

While primary territorial title (Kalla-Boodja) was vested exclusively in localised clan lineages, Bibbullmun property law incorporated a highly sophisticated system of usufructuary rights.^[1] In customary jurisprudence, usufruct denotes the legally recognised entitlement to enter, harvest, and utilise the natural fruits of an estate without holding radical proprietary title to the land itself.^[2] This legal duality resolved the fundamental tension between fixed territorial boundaries and variable ecological resources: it allowed clans experiencing local seasonal shortages or following migratory fauna to access foreign estates under strictly codified reciprocal treaties.^[3]

2. Kinship Networks as Resource Entitlements

Usufructuary entitlements were distributed primarily through the sprawling webs of maternal and paternal kinship (Moort).^[4] An individual possessed automatic usufructuary harvesting rights not only in their father's estate (kalla), but also in their mother's country (kurt-boodja), their spouse's ancestral lands, and the estates of their formal initiation brothers (wangariny).^[5] When seasonal fish runs, emu nesting, or acacia seed ripening occurred in a neighboring valley, allied kin could travel freely into that territory, participate in the harvest, and camp alongside local custodians, provided they respected local totemic restrictions and shared a proportion of the catch with the estate elders.^[6]

3. Seasonal Treaties & Inter-Tribal Foraging Compacts

Beyond kinship networks, formal diplomatic compacts governed large-scale, multi-tribal resource harvesting events.^[7] During the late summer season (Bunuru), when immense shoals of sea mullet (Kalkada) entered the Mandurah and Peel-Harvey estuaries, hundreds of people from across the southwest converged on the coast under temporary treaties of mutual non-aggression.^[8] Similar seasonal treaties opened up inland grazing plains during kangaroo drives or permitted coastal clans to travel into the Darling Scarp to collect rare red ochre (wilgi) and hard diorite stones for ax making (kodj).^[9] These compacts established that while the land remained sovereign to the host clan, its bounty was subject to equitable regional sharing.^[10]

4. Customary Usufruct in Modern International Law

Under international human rights jurisprudence, customary usufructuary rights are recognised as inalienable property interests protected against state confiscation.^[11] Decisions of the Inter-American Court of Human Rights and the African Court on Human and Peoples' Rights affirm that traditional foraging and resource access constitute customary property title that survives colonial dispossession. Re-establishing statutory recognition of Bibbullmun usufructuary rights across public conservation estates is vital for ensuring genuine food sovereignty and cultural survival.^[12]