<DOCUMENT>
<TYPE>EX-99
<SEQUENCE>13
<FILENAME>imccert.txt
<DESCRIPTION>EXHIBIT 99.1 IAN M. CUMMING CERTIFICATION
<TEXT>
                                                                Exhibit 99.1




                                  CERTIFICATION
                       PURSUANT TO 18 U.S.C. SECTION 1350,
           AS ADOPTED BY SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

                  I, Ian M. Cumming, as Chairman of the Board and Chief
Executive Officer of Leucadia National Corporation (the "Company") certify,
pursuant to 18 U.S.C. ss. 1350, as adopted by Section 906 of the Sarbanes-Oxley
Act of 2002, that to my knowledge:

                  (1) the accompanying Form 10-K report for the year ended
December 31, 2002 as filed with the U.S. Securities and Exchange Commission (the
"Report") fully complies with the requirements of Section 13(a) or 15(d) of the
Securities Exchange Act of 1934, as amended; and

                  (2) the information contained in the Report fairly presents,
in all material respects, the financial condition and results of operations of
the Company.


Dated:  March 28, 2003
                                           By: /s/ Ian M. Cumming
                                               ------------------------------
                                               Ian M. Cumming
                                               Chairman of the Board and
                                               Chief Executive Officer






A signed original of this written statement required by Section 906 has been
provided to Leucadia National Corporation and will be retained by Leucadia
National Corporation and furnished to the Securities and Exchange Commission or
its staff upon request.




</TEXT>
</DOCUMENT>
