ANSI format conforms to the American National Standard COBOL reference
  format.  It describes COBOL programs in terms of character positions on
  an input line.  A source program line has 80 character positions:

    Margin  L         C     A          B           R
            |         |     |          |           |
            +--------------------------------------------------+
    column  |  1 - 6  |  7  |  8 - 11  |  12 - 72  |  73 - 80  |
            +--------------------------------------------------+
                 |       |       |           |           |
                 |       |    Area A      Area B     Identification Area
                 |       |
                 |  Indicator Area
                 |
             Sequence Number Area

  The compiler expects ANSI format only when the command line includes
  the /ANSI_FORMAT qualifier.