EX-33 (d)
REPORT ON ASSESSMENT OF COMPLIANCE WITH
REGULATION AB SERVICING CRITERIA


Re:     MASTR SECOND LIEN TRUST 2006-1, (the "MASTR Second Lien Trust 2006-1")
        Mortgage Pass-Through Certificates, Series 2006-1, issued pursuant to a
        Pooling and Servicing Agreement dated as of February 1, 2006, among
        Mortgage Asset Securitization Transactions, Inc., (the "Depositor"), UBS
        Real Estate Securities, Inc., Wells Fargo Bank, N.A., (the "Master
        Servicer"), Trust Administrator and Custodian, and The Bank of New York
        as successor to JPMorgan Chase Bank, National Association, f/k/a
        JPMorgan Chase Bank, as Trustee (the "Trustee").


This Report on Assessment of Compliance with Regulation AB Servicing Criteria
(the "Report") is being delivered pursuant to Section 12.05(a)(i) of the
Servicing Agreement dated as of August 1, 2005, between Irwin Union Bank and
Trust Company (the "Servicer") and UBS Real Estate Securities Inc. (the "Owner")
(as amended by (i) Amendment One to the Servicing Agreement dated as of February
2, 2006, by and between the Owner and the Servicer, and (ii) an Assignment,
Assumption and Recognition Agreement dated as of February 24, 2006, among the
Owner as Assignor, the Depositor and the Servicer (together, and as such
agreement may be amended, supplemented or otherwise modified from time to time,
the "Servicing Agreement")).

I assert to,the Depositor, the Master Servicer and the Trustee, and their
respective officers, with the knowledge and intent that they will rely upon this
assertion, that:

1.      I am a duly authorized officer of the Servicer;

2.      The Servicer is responsible for assessing compliance as of December 31,
        2006 and for the period from April 1, 2006 through December 31, 2006
        (the "Reporting Period") with the servicing criteria set forth in
        paragraph (d) of Item 1122 of Regulation AB, except for the servicing
        criteria set forth in Section 1122(d)(1)(iii) (the servicing criteria,
        after giving effect to the exception identified above, are defined for
        the purpose of this Report as the "Applicable Servicing Criteria"). The
        sole asset-backed securitization transaction covered by this report is
        the MASTR Second Lien Trust 2006-1;

3.      The Servicer has assessed its compliance with the Applicable Servicing
        Criteria for the Reporting Period.

4.      The Servicer has identified one instance of material noncompliance with
        the servicing criteria set forth in Section 1122(d)(2)(vii)(b) of
        Regulation AB. Specifically, the Servicer failed to prepare bank account
        reconciliations within 30 days after the bank statement cutoff date;

5.      The Servicer has concluded that, with the exception of the
        aforementioned instance of material noncompliance, the Servicer has
        complied, in all material respects, with the Applicable Servicing
        Criteria as of December 31, 2006 and for the Reporting Period with
        respect to the MASTR Second Lien Trust 2006-1 asset-backed
        securitization transaction. Although the Servicer is responsible for
        assessing compliance with Sections


(page)


        1122(d)(3)(i)(C), 1122(d)(4)(i), 1122(d)(4)(x)(A), 1122(d)(4)(x)(B),
        1122(d)(4)(x)(C), 1122(d)(4)(xi), 1122 (d)(4)(xii), 1122(d)(4)(xiii) and
        1122(d)(4)(xv) of Regulation AB, there are no servicing activities
        performed by the Servicer during the Reporting Period that required
        these servicing criteria to be complied with; and

6.      Ernst & Young LLP, an independent registered public accounting firm, has
        issued an attestation report on the Servicer's assessment of compliance
        with the Applicable Servicing Criteria as of December 31, 2006 and for
        the Reporting Period, which attestation report is attached hereto as
        Exhibit A.


IN WITNESS WHEREOF, the Servicer has caused this Report to be executed and
delivered on its behalf by its duly authorized officer on this 1st day of March
2007.

IRWIN UNION BANK AND TRUST COMPANY


Attest By: /s/ Barbara Snethan
Barbara Snethen
Assistant Secretary -
Home Equity Lending

By: /s/ Dan Kuster
Dan Kuster
Vice President - Finance
Home Equity Lending