How long do you think First Nations have been fighting against inequitable treatment of First Nation women by federal government laws and policies? ........At least since 1869 and likely back to 1867 with the passage of the British North America Act  and Section 91.24 when the Federal Government gained control of Indians and Lands reserved for Indians.
"The Indians themselves objected strenuously to penalties being imposed on Indian women but were ignored. In 1872 the Grand Council of Ontario and Quebec Indians (founded in 1870) sent a strong message to the Minister at Ottawa protesting among other things section 6 of the 1869 Act in the following unmistakable terms: 'They (members of the Grand Council) also desire amendments to Section 6 of the Act of 1869 so that Indian women may have the privilege of marrying when and whom they please; without subjecting themselves to exclusion or expulsion from their tribes and the consequent loss of property and the rights they may have by virtue of their being members of any particular tribe. The Indians' request went unheeded" 
Gender-based discrimination is very much part of Indian Act policies. This long history of discrimination included loss of status for if a status Indian woman married a non-status man, the loss of status was also borne by the children. For more information, please read "Indian Act and Women's Status: Discrimination via Bill C-31, Bill C-3"
Matrimonial real property is the family home where a couple lives during a marriage or common law relationship. When that relationship breaks up, provincial and territorial laws protect the matrimonial real property interests and rights of both partners - there is legal protection that ensures that the matrimonial real property is dealt with equitably. Not so much the case for a First Nation woman who lives on a reserve. For a First Nation couple living on a reserve, when the relationship breaks down, the woman has no legal recourse for equitable division of property.
On June 19, 2013 the Family Homes on Reserves and Matrimonial Interests or Rights Act received Royal Assent. Known as the Matrimonial Real Property Act (MRPA), the Act is designed to provide women living on First Nation reserves the same access to matrimonial rights as those living off reserves.
Canadian divorce laws rely on the assumption that the family home can be sold at fair market value and the proceeds divvied up but on reserves there is no fair market value for homes because there is no market. Reserve land, held by the federal government in trust for the band as a whole, can't be sold - so, despite the Act, the person who leaves the family home still does so with nothing.
Under the MPRA, First Nations can develop their own laws to deal with disbursement of property, but those laws have to fall within the guidelines of the MRPA; the federal rules are the default option. Easier said than done. Developing its own laws is a monumental undertaking for a First Nation as they will be dealing with the 19th century paternalism of the the Indian Act and the 20th century European concepts of equality while trying to respect and integrate their own cultures and traditions.
This is a complex Act - what we have provided here is a brief synopsis.
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 Now The Constitution Act, 1876
 Kathleen Jamieson, Indian Women and the Law in Canada: Citizens Minus (Ottawa: Advisory Council on the Status of Women, Ministry of Supply & Service Canada, 1978) at p. 30