PUBLIC LAW 102-241—DEC. 19, 1991 105 STAT. 2221 nonprofit center for public benefit. In connection therewith, the property may be used for educational, historic, recreational, and cultural programs open to and for the benefit of the general public. Theme displays, museum, gift shop, open exhibits, meeting rooms, and an office and quarters for personnel in connection with security and administration of the property are expressly authorized. Other uses not inconsistent with the foregoing uses are permitted unless the Secretary shall reasonably determine that such uses are incompatible with the historic nature of the property or with other provisions of this section. (3) Any conveyance of property pursuant to this section shall be subject to such conditions as the Secretary considers to be necessary to assure that— (A) any light, antennas, sound signal, and associated equipment located on the property conveyed, which are active aids to navigation, shall continue to be operated and maintained by the United States; (B) the State of New Hampshire may not interfere or allow interference in any manner with such aids to navigation without express written permission from the United States; (C) there is reserved to the United States the right to relocate, replace, or add any aids to navigation or make any changes on any portion of such property as may be necessary for navigation purposes; (D) the United States shall have the right, at any time, to enter such property with notice for the purpose of maintaining navigational aids; and (E) the United States shall have an easement of access to such property for the purpose of maintaining the navigational aids in use on the property. (4) The State of New Hampshire shall not have any obligation to maintain any active aid-to-navigation equipment on property conveyed pursuant to this section. (c) For purposes of this section, the term "White Island Lighthouse" means the Coast Guard lighthouse located at White Island, Isles of Shoals, New Hampshire, including the attached keeper's dwelling, several ancillary buildings, the associated fog signal, and such lands as may be necessary to enable the State of New Hampshire to operate at that lighthouse a nonprofit center for public benefit. SEC. 31. CONVEYANCE OF PORTLAND HEAD LIGHTHOUSE. (a)(1) The Secretary shall convey to the Town of Cape Elizabeth, Maine, by any appropriate means of conveyance, all right, title, and interest of the United States in and to property comprising the Portland Head Lighthouse. (2) The Secretary may identify, describe, and determine the property to be conveyed pursuant to this section. (b)(1) A conveyance of property pursuant to this section shall be made— (A) without the payment of consideration; and (B) subject to such terms and conditions as the Secretary may consider appropriate. (2) In addition to any term or condition established pursuant to paragraph (1), any conveyance of property pursuant to this section shall be subject to the condition that all right, title, and interest in and to all such property so conveyed shall immediately revert to the Mcdne. Historic preservation. Real property.