-.I Chgrp
-changes the group-ID of the
-.I files
-to
-.IR group .
-The group may be either a decimal GID or
-a group name found in the group-ID file.
-.PP
-Only the super-user can change owner or group,
-in order to simplify as yet unimplemented accounting procedures.
+Only the super-user can change owner,
+in order to simplify accounting procedures.
+No errors are reported when the
+.B \-f
+(force) option is given.