This standard contains references to other American National Standards and federal regulations, which, through reference in this text, constitute provisions of this American National Standard. See Annex D, Additional Resources, for a list of these and other applicable informative references. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this American National Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated in Annex D.
Because of the many specialized procedures utilized during arboricultural operations, it must be emphasized that exceptions to provisions of these standards may be acceptable and that flexibility and/or a decision as to the applicability of these standards to professional operations may be required.