The original copyright notice of MOPAC7:
C Notice of Public Domain nature of MOPAC
C 'This computer program is a work of the United States
C Government and as such is not subject to protection by
C copyright (17 U.S.C. # 105.) Any person who fraudulently
C places a copyright notice or does any other act contrary
C to the provisions of 17 U.S. Code 506(c) shall be subject
C to the penalties provided therein. This notice shall not
C be altered or removed from this software and is to be on
C all reproductions.'
Changes made to MOPAC7 code in this work may be used/distributed under the
same rules as the original MOPAC7 package; this work is in Public Domain.