Notwithstanding any other provision of law, the department is authorized to:

1. (a) Assist homeowners displaced by the expansion of the airport to relocate in comparable residential areas and housing.
2. (b) Provide, where available, replacement housing acceptable to affected homeowners.
3. (c) Purchase affected property to compensate homeowners for the depressed values of their property as a result of the proximity of the airport to enable such homeowners to purchase comparable housing under more normal market conditions.