EXHIBIT 31.1

                                CERTIFICATIONS

I, W. Brent LaGere, certify that:

1.  I have reviewed this quarterly report on Form 10-Q of Chandler (U.S.A.),
    Inc.;

2.  Based on my knowledge, this report does not contain any untrue statement
    of a material fact or omit to state a material fact necessary to make
    the statements made, in light of the circumstances under which such
    statements were made, not misleading with respect to the period covered
    by this report;

3.  Based on my knowledge, the financial statements, and other financial
    information included in this report, fairly present in all material
    respects the financial condition, results of operations and cash flows
    of the registrant as of, and for, the periods presented in this report;

4.  The registrant's other certifying officer(s) and I are responsible for
    establishing and maintaining disclosure controls and procedures (as
    defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant
    and have:

        a)  Designed such disclosure controls and procedures, or caused such
        disclosure controls and procedures to be designed under our
        supervision, to ensure that material information relating to the
        registrant, including its consolidated subsidiaries, is made known
        to us by others within those entities, particularly during the period
        in which this report is being prepared;

        b)  Evaluated the effectiveness of the registrant's disclosure
        controls and procedures and presented in this report our conclusions
        about the effectiveness of the disclosure controls and procedures, as
        of the end of the period covered by this report based on such
        evaluation; and

        c)  Disclosed in this report any change in the registrant's internal
        control over financial reporting that occurred during the registrant's
        most recent fiscal quarter (the registrant's fourth fiscal quarter in
        the case of an annual report) that has materially affected, or is
        reasonably likely to materially affect, the registrant's internal
        control over financial reporting; and

5.  The registrant's other certifying officer(s) and I have disclosed, based
    on our most recent evaluation of internal control over financial reporting,
    to the registrant's auditors and the audit committee of registrant's board
    of directors (or persons performing the equivalent functions):

        a)  All significant deficiencies and material weaknesses in the design
        or operation of internal control over financial reporting which are
        reasonably likely to adversely affect the registrant's ability to
        record, process, summarize and report financial information; and

        b)	Any fraud, whether or not material, that involves management or
        other employees who have a significant role in the registrant's
        internal control over financial reporting.


Date:  May 8, 2007



                                        /s/ W. Brent LaGere
                                        --------------------------------------
                                        W. Brent LaGere
                                        Chairman of the Board and
                                        Chief Executive Officer


<PAGE>

                                                                  EXHIBIT 31.1
                                                                   (CONTINUED)

                                CERTIFICATIONS

I, Mark C. Hart, certify that:

1.  I have reviewed this quarterly report on Form 10-Q of Chandler (U.S.A.),
    Inc.;

2.  Based on my knowledge, this report does not contain any untrue statement
    of a material fact or omit to state a material fact necessary to make
    the statements made, in light of the circumstances under which such
    statements were made, not misleading with respect to the period covered
    by this report;

3.  Based on my knowledge, the financial statements, and other financial
    information included in this report, fairly present in all material
    respects the financial condition, results of operations and cash flows
    of the registrant as of, and for, the periods presented in this report;

4.  The registrant's other certifying officer(s) and I are responsible for
    establishing and maintaining disclosure controls and procedures (as
    defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the registrant
    and have:

        a)  Designed such disclosure controls and procedures, or caused such
        disclosure controls and procedures to be designed under our
        supervision, to ensure that material information relating to the
        registrant, including its consolidated subsidiaries, is made known
        to us by others within those entities, particularly during the period
        in which this report is being prepared;

        b)  Evaluated the effectiveness of the registrant's disclosure
        controls and procedures and presented in this report our conclusions
        about the effectiveness of the disclosure controls and procedures, as
        of the end of the period covered by this report based on such
        evaluation; and

        c)  Disclosed in this report any change in the registrant's internal
        control over financial reporting that occurred during the registrant's
        most recent fiscal quarter (the registrant(s fourth fiscal quarter in
        the case of an annual report) that has materially affected, or is
        reasonably likely to materially affect, the registrant's internal
        control over financial reporting; and

5.  The registrant's other certifying officer(s) and I have disclosed, based on
    our most recent evaluation of internal control over financial reporting,
    to the registrant's auditors and the audit committee of registrant's board
    of directors (or persons performing the equivalent functions):

        a)  All significant deficiencies and material weaknesses in the design
        or operation of internal control over financial reporting which are
        reasonably likely to adversely affect the registrant's ability to
        record, process, summarize and report financial information; and

        b)  Any fraud, whether or not material, that involves management or
        other employees who have a significant role in the registrant's
        internal control over financial reporting.


Date:  May 8, 2007



                                        /s/ Mark C. Hart
                                        --------------------------------------
                                        Mark C. Hart
                                        Senior Vice President - Finance,
                                        Chief Financial Officer
                                        and Treasurer