PUBLIC LAW 102-555—OCT. 28, 1992 106 STAT. 4177 land remote sensing data set (hereinafter referred to as the "basic data set") and shall follow reasonable archival practices to assure proper storage and preservation of the basic data set and timely access for parities requesting data. (c) DETERMINATION OP CONTENT OP BASIC DATA SET.—In deter- mining the initial content of, or in upgrading, the basic data set, the Secretary of Interior shall— (1) use as a baseline the data archived on the date of enactment of this Act; (2) take into account future technical and scientific develop- ments and needs, paying particular attention to the anticipated data requirements of global environmental change research; (3) consult with and seek the advice of users and producers of remote sensing data and data products; (4) consider the need for data which may be duplicative in terms of geographical coverage but which differ in terms of season, spectral bands, resolution, or other relevant factors; (5) include, as the Secretary of the Interior considers appro- priate, unenhanced data generated either by the Landsat sys- tem, pursuant to title I, or by licensees under title II; (6) include, as the Secretary of the Interior considers appro- priate, data collected by foreign ground stations or by foreign remote sensing space systems; and (7) ensure that the content of the archive is developed in accordance with section 506. (d) PUBLIC DOMAIN.—After the expiration of any exclusive right to sell, or after relinquishment of such right, the data provided to the National Satellite Land Remote Sensing Data Archive shall be in the public domain and shall be made available to requesting parties by the Secretary of the Interior at the cost of fulfilling user requests. SEC. 503. NONREPRODUCTION. Unenhanced data distributed by any licensee under title II of this Act may be sold on the condition that such data will not be reproduced or disseminated by the purchaser for commercial purposes. SEC. 504. REIMBURSEMENT FOR ASSISTANCE. The Administrator, the Secretary of Defense, and the heads of other United States Government agencies may provide assistance to land remote sensing system operators under the provisions of this Act. Substantial assistance shall be reimbursed by the operator, except as otherwise provided by law. SEC. MS. ACQUISITION OF EQUIPMENT. The Landsat Program Management may, by means of a competitive process, allow a licensee under title II or any other private party to buy, lease, or otherwise acquire the use of equip- ment from the Landsat system, when such equipment is no longer needed for the operation of such system or for the sale of data from such system. Officials of other United States Government civilian agencies are authorized and encouraged to cooperate with the Secretary in carrying out this section. SEC. 606. RADIO FREQUENCY ALLOCATION. (a) APPLICATION TO FEDERAL COMMUNICATIONS COMMISSION.— To the extent required by the Communications Act of 1934 (47 15 USC 5653. 15 USC 5654. 15 USC 5655. 15 USC 5656.