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                                                                    EXHIBIT 4.16



                            CERTIFICATE OF TRUST OF
                              CCC CAPITAL TRUST I


         THIS CERTIFICATE OF TRUST OF CCC CAPITAL TRUST I (the "Trust"), dated
December 6, 1999, is being duly executed and filed by the undersigned trustees
for the purposes of organizing a business trust pursuant to the Delaware
Business Trust Act (12 Del. C. Section 3801 et seq.).

         1.  NAME. The name of the business trust formed hereby is CCC Capital
Trust I.

         2.  DELAWARE TRUSTEE. The name and business address of the trustee of
the Trust with its principal place of business in the State of Delaware is The
Bank of New York (Delaware), Route 273, 110 White Clay Center, Newark, Delaware
19711.

         3.  EFFECTIVE DATE. This Certificate of Trust shall be effective upon
filing with the Secretary of State of the State of Delaware.

         IN WITNESS WHEREOF, the undersigned, being all of the trustees of the
Trust, have executed this Certificate of Trust as of the date first above
written.

                                      THE BANK OF NEW YORK (DELAWARE),
                                      not in its individual capacity but solely
                                      as trustee of the Trust


                                      By:  /s/ Frederick W. Clark
                                         ---------------------------------------
                                      Name:  Frederick W. Clark
                                      Title: Authorized Signatory


                                      THE BANK OF NEW YORK,
                                      not in its individual capacity but solely
                                      as trustee of the Trust


                                      By:  /s/ Van K. Brown
                                         ---------------------------------------
                                      Name:  Van K. Brown
                                      Title: Assistant Vice President