; reversion (1) Required use The Federal land conveyed under subsection (a) may be used by the Government of Guam only for the Guam Waterworks Authority to operate the public drinking water system of the territory of Guam. (2) Reversion If the Secretary determines that the Federal land conveyed to the Government of Guam pursuant to subsection (a) is not used in accordance with paragraph (1), all right, title, and interest in and to such parcel shall, at the option of the Secretary, revert to the United States. 8. Technical amendments Section 6 of the Act entitled An Act to authorize appropriations for certain insular areas of the United States, and for other purposes , approved August 18, 1978 ( 16 U.S.C. 410dd ), is amended— (1) in subsection (l), by striking herosim and inserting heroism ; and (2) in subsection (n), by striking section (l) before the final period and inserting subsection (l) .