ex35 a) [Aurora Loan Services Logo] Depositor:  Structured Asset Securities Corporation                    745 Seventh Avenue, 8th Floor                      New York, NY 10019 Trustee:      US Bank, N.A.                      One Federal Street, 3rd Floor                    Boston, MA 02110 Securities Administrator:   Subject: Annual Officer's Certification Fiscal Year: 2006 Securitization: LXS 2006-4N I, E. Todd Whittemore, the undersigned, a duly authorized officer of Aurora Loan Services LLC (the "Master Servicer"), do certify the following for the Calendar Year 2006: 1.    A review of the activities of the Master Servicer during the preceding calendar year (or portion thereof) and of its performance under the Agreement for such period has been made under my supervision. 2.     To the best of my knowledge, based on such review, the Master Servicer has fulfilled all of its obligations under the Agreement in all material aspects throughout 2006 (or applicable portion thereof), or, if there has been a failure to fulfill any such obligation in any material respect, I have specifically identified to  the  Depositor, and the Trustee each such failure known to me and the nature and status thereof, including the steps being taken by the Master Servicer to remedy such default. Certified by:  AURORA LOAN SERVICES LLC By: /s/  E. Todd Whittemore Name:  E. Todd Whittemore Title:    Executive Vice President b) Countrywide HOME LOANS 400 Countrywide Way February 28, 2007  Simi Valley, California 93065-6298 U.S. Bank National Association One Federal Street, 3rd FL Boston, MA 02210 OFFICER'S CERTIFICATE I, Joseph Candelario, hereby certify that I am an officer of Countrywide GP, Inc., general partner of Countrywide Home Loans Servicing LP (the "Servicer"). I further certify, with respect to the applicable servicing agreement relating to the securitization transaction(s) set forth on Exhibit A attached hereto (the "Servicing Agreement") that: (a) A review of the activities of the Servicer during the preceding calendar year and of the performance of the Servicer under the Servicing Agreement has been made under my supervision; and (b) To the best of my knowledge, based on such review, the Servicer has fulfilled all of its obligations under the Servicing Agreement in all material respects throughout such year, /s/: Joseph Candelario  February 28, 2007 Joseph Candelario First Vice President Compliance Officer Loan Administration See Deal Name listing on following page. Exhibit A  SASCO 2006-BC2  SASCO 2006-BC3  SASCO 2006-BC4  SASCO 2006-BC5  LXS 2006-2N  LXS 2006-4N  LXS 2006-ION  LXS 2006-12N  LXS 2006-16N  LXS 2006-18N  CSR 2006-AR1  HARBORVIEW 2006-1  HARBORVIEW 2006-4  GSR 2006-1 F (SUB)  GSR 2006-2F (SUB)  GSR 2006-3 F (SUB)  GSR 2006-5F (SUB)  GSR 2006-6F  GSR 2006-7F  GSR 2006-8F  GSR 2006-9F  SAIL 2006-3  HARBORVIEW 2006-CB1  PRIME 2006-CL I  SARM 2006-1  SARM 2006-10  SARM 2006-11  SARM 2006-2  SARM 2006-3  SARM 2006-4  SARM 2006-5  SARM 2006-7  SARM 2006-8  SARM 2006-9  SARM 2006-12  LXS 2006-3 c) **GMAC Mortgage**SERVICER COMPLIANCE STATEMENT (Item 1123) GMAC Mortgage, LLC 2006-4NThe undersigned, a duly authorized officer of GMAC Mortgage, LLC, as servicer (the "Servicer") pursuant to the applicable servicing agreement, does hereby certi& that:  1. A review of the Servicer's activities during the period covered by the Issuing Entity's report on Form 10-K and of the Servicer's performance under the applicable servicing agreement has been made under my supervision.  2. To the best of my knowledge, based on such review, the Servicer has fulfilled all of its obligations under the applicable servicing agreement in all material respects throughout such period.  IN WITNESS WHEREOF, the undersigned has duty executed this Certificate this 6th day of March 2007.  By:  GMAC Mortgage LIC  5oo Enterprise Road  1-lorsham. PA **1g044**www.gmacmortgage.com Anthony N. Renzi  Title: Executive Vice President  d) **GREENPOINT MORTGAGE FUNDING, INC.****SERVICER COMPLIANCE STATEMENT****LXS 2006-4N******J, Michael Dc Francesco, an authorized officer of GreenPoint Mortgage Funding, Inc. (the "Servicer"), certify that:  1. A review of the Servicer's activities during the period from and including January 1, 2006 through and including December 31, 2006 (or applicable portion thereof) and of the Servicer's performance under the applicable servicing agreement has been made under my supervision.  2. To the best of my knowledge, based on such review, the Servicer has fulfilled all of its obligations under the applicable servicing agreement in all material respects throughout such period.  Capitalized items used but not defined herein have the meanings ascribed to them in the Agreement.  Date:  February 28, 2007  /s/ Michael De Francesco  Michael De Francesco  Senior Vice President, Loan Administration