• X An invoked COBOL method must have the same number of formal parameters
  X on its procedure division USING phrase as there are arguments on the
  X INVOKE USING phrase. The presence or absence of USING...BY VALUE must
  X be consistent on the INVOKE statement and the Procedure Division
  X header of the target method.

• X If a formal parameter is a COBOL elementary data item not described
  X with USAGE IS OBJECT REFERENCE, then the corresponding argument must
  X have the same PICTURE, USAGE, SIGN, SYNCHRONIZED, JUSTIFIED, and BLANK
  X WHEN ZERO clauses. Note that periods and commas can be interchanged
  X if specifying the DECIMAL POINT IS COMMA clause, and PICTURE clause
  X currency symbols can differ.

• X If a formal parameter is a COBOL elementary data item described with
  X USAGE IS OBJECT REFERENCE then:
  • X If the argument is passed BY REFERENCE, then the argument and the
    X parameter must be defined with identical USAGE clauses.

  • X If the argument is passed BY VALUE or BY CONTENT, and the
    X parameter specified on the method Procedure Division USING phrase
    X is a universal object reference, then the argument can be any
    X object reference.

  • X If the argument is passed BY VALUE or BY CONTENT, and the
    X parameter specified on the method Procedure Division USING phrase
    X is an object reference typed to a specific class, then the
    X argument must be an object reference typed to the same or a
    X derived class.

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