year in this
certificate
first
above written.
Notary Public
____________________________________
[Notarial Seal]
EXHIBIT A
FORM OF CLASS A-[_] CERTIFICATE
SOLELY FOR U.S. FEDERAL INCOME TAX PURPOSES,
THIS
CERTIFICATE IS A "REGULAR
INTEREST" IN A "REAL ESTATE
MORTGAGE INVESTMENT CONDUIT," AS THOSE TERMS ARE DEFINED,
RESPECTIVELY,
IN SECTIONS 860G AND 860D OF THE INTERNAL
REVENUE
CODE OF 1986
COUPLED WITH THE RIGHT TO RECEIVE
BASIS RISK
SHORTFALLS
AND AN INTEREST IN THE SB-AM SWAP
AGREEMENT.
THE CERTIFICATE
PRINCIPAL BALANCE OF THIS CERTIFICATE WILL BE DECREASED BY THE PRINCIPAL
PAYMENTS HEREON
AND REALIZED
LOSSES
ALLOCABLE
HERETO.
ACCORDINGLY,
FOLLOWING
THE INITIAL
ISSUANCE OF THE
CERTIFICATES,
THE
CERTIFICATE
PRINCIPAL
BALANCE OF THIS
CERTIFICATE WILL BE DIFFERENT FROM THE
DENOMINATION
SHOWN BELOW.
ANYONE
ACQUIRING THIS CERTIFICATE MAY ASCERTAIN ITS CERTIFICATE PRINCIPAL BALANCE BY INQUIRY OF THE TRUSTEE NAMED HEREIN.
UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
REPRESENTATIVE
OF THE DEPOSITORY TRUST COMPANY,
A
NEW YORK CORPORATION ("DTC"), TO THE TRUSTEE OR ITS AGENT FOR REGISTRATION OF TRANSFER,
EXCHANGE,
OR PAYMENT, AND
ANY
CERTIFICATE
ISSUED
IS
REGISTERED
IN THE NAME OF CEDE & CO. OR IN SUCH
OTHER
NAME AS IS
REQUESTED
BY AN
AUTHORIZED
REPRESENTATIVE
OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER
ENTITY AS IS
REQUESTED
BY AN AUTHORIZED
REPRESENTATIVE
OF DTC), ANY TRANSFER,
PLEDGE,
OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR
TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.
ANY TRANSFEREE OF THIS
CERTIFICATE
THAT IS A PLAN INVESTOR WILL BE DEEMED TO HAVE REPRESENTED THAT AS OF
ANY DATE PRIOR TO THE
TERMINATION
OF THE SWAP
AGREEMENT,
AT LEAST ONE OF U.S.
DEPARTMENT
OF LABOR
PROHIBITED
TRANSACTION
CLASS EXEMPTIONS
84-14,
90-1,
91-38,
95-60,
96-23 OR OTHER APPLICABLE
EXEMPTION
APPLIES TO SUCH
HOLDER'S RIGHT TO RECEIVE PAYMENTS FROM THE SUPPLEMENTAL INTEREST TRUST.
IF THIS
CERTIFICATE
(OR ANY
INTEREST
THEREIN)
IS ACQUIRED OR HELD BY ANY PERSON THAT DOES NOT SATISFY
THE
CONDITIONS
DESCRIBED
IN THE
PRECEDING
PARAGRAPH,
THEN THE LAST
PRECEDING
TRANSFEREE
THAT IS NOT A PLAN
INVESTOR
OR
SATISFIES
SUCH
CONDITIONS
SHALL BE
RESTORED,
TO THE EXTENT
PERMITTED
BY LAW, TO ALL RIGHTS AND
OBLIGATIONS
AS
CERTIFICATE
OWNER
THEREOF
RETROACTIVE
TO THE DATE OF SUCH
TRANSFER OF THIS
CERTIFICATE.
THE
TRUSTEE
SHALL BE UNDER NO
LIABILITY
TO ANY
PERSON
FOR
MAKING ANY
PAYMENTS
DUE ON THIS
CERTIFICATE
TO SUCH
PRECEDING TRANSFEREE.
ANY PURPORTED
CERTIFICATE
OWNER WHOSE
ACQUISITION OR HOLDING OF THIS CERTIFICATE (OR INTEREST
THEREIN)
WAS EFFECTED IN VIOLATION OF THE
RESTRICTIONS
IN SECTION
5.02(E) OF THE POOLING AND
SERVICING
AGREEMENT
SHALL
INDEMNIFY AND HOLD HARMLESS THE DEPOSITOR,
THE TRUSTEE, THE MASTER SERVICER,
ANY SUBSERVICER,
AND THE TRUST FUND
FROM AND AGAINST ANY AND ALL LIABILITIES,
CLAIMS,
COSTS OR EXPENSES
INCURRED BY SUCH PARTIES AS A RESULT OF SUCH
ACQUISITION OR HOLDING.
CUSIP: _____________________
Certificate No. A-[__]-[__]
Date of Pooling and Servicing Agreement: February 1, 2007
Adjustable Pass-Through Rate
Cut-off Date:
February 1, 2007
First Distribution Date: March 26, 2007