The Migratory Bird Conservation Fund provides the Department of the Interior with monies to acquire migratory bird habitat. There are three major sources of money for the Fund. The most wellknown source is the revenue received from the sale of Migratory Bird Hunting and Conservation Stamps, commonly known as Duck Stamps, as provided for under the Migratory Bird Hunting and Conservation Stamp Act of March 18, 1934, as amended. The other two major sources include appropriations authorized by the Wetlands Loan Act of October 4, 1961, as amended and import duties collected on arms and ammunition. The Fund is further supplemented by receipts from the sale of products from refuge lands and rights-of-ways across national wildlife refuges, the disposal of refuge lands, and reverted Federal Aid funds.