A joint resolution to extinguish any right, title, or interest to certain lands in the Commonwealth of Massachusetts.

Extinguishes any right, title, or other interest in tracts of land on which dwellings of individuals are located, that is asserted by the Mashpee Tribe in its civil action against the New Seabury Corporation in Massachusetts. Limits the size of the tracts so affected by this Act to one acre, with a designation by the Secretary of the Interior of up to one acre to be so affected on tracts which now exceed that size.