Mineral Development Act

[AI summary unavailable — showing source text] Mineral Development Act - Title I: Declares that it is the purpose of this Act to assist in carrying out the policy of the United States as expressed in the Mining and Minerals Act of 1970 by establishing a system to provide for and encourage the development of certain mineral resources on the public lands of the United States. Title II: Existing Mining Claims and Mill Sites - Provides that mining claims and millsites located under the 1872 mining law are null and void unless an application for a patent or a declaration of interest is filed. States that a declaration of interest may be filed for a mining claim whether or not there has been a discovery of a valuable mineral deposit. Provides that any person having an interest in a claim may file the declaration of interest and such declaration must show the names and addresses of the owners, and a description of the claims, including acreage. Authorizes the Secretary of Interior to require additional information if the description is insufficient. Provides that such claims may be perfected by a discovery at any time within five years, but if the United States has specific need for any limited area of land, claims on that land may co…