Document:

Exhibit 10.6 to CNS, Inc. Form 8-K dated October 8, 2006

Exhibit 10.6

Form of Amendment of October 8, 2006 to CNS,
Inc. 1987 Employee Incentive Stock Option Plan, CNS, Inc. 1990 Stock Plan, CNS, Inc. 1994 Amended Stock Plan and CNS, Inc. 2000
Stock Option Plan.

Notwithstanding anything in the Option Agreement
to the contrary, in the event of the merger of the Company with another entity in which the shareholders of the Company will
receive consideration in a form other than shares of the successor or surviving entity: (a) this Option shall be exercisable as to
all shares remaining under the option without regard to any vesting or installment exercise provisions otherwise contained therein
immediately prior to the effective time of the merger; and (b) if this Option is then outstanding on and remains unexercised as to
any shares as of the effective time of the merger, then this Option shall be cancelled as of such effective time and the Optionee
shall receive, as the sole and complete consideration for the cancellation of the Option and in lieu of any and all interest in,
and right to receive the common stock of the Company or any substitute option or right in the common stock of its successor or
survivor following the merger, with respect to all of the shares of common stock subject to such cancelled options as of the date
of such cancellation, cash in an amount equal to the net amount of (i) the product of the excess, if any, of the merger
consideration over the exercise price per share multiplied by the number of shares subject to the Option, less (ii) any applicable
tax withholding. If the exercise price per share of this Option equals or exceeds the merger consideration, the cash amount shall
be zero. [Notwithstanding anything in the Plan to the contrary, any Optionee who, as of the effective time of the merger, has not
elected to exercise any Option shall be deemed to have consented to the cancellation of the Option in exchange for the merger
consideration as set forth above if and to the extent the cancellation and payment of the spread is deemed an amendment to the
Option.]

 

[Bracketed language included in the amendment to
the CNS, Inc. 1990 Stock Plan, CNS, Inc. 1994 Amended Stock Plan, and CNS, Inc. 2000 Stock Option Plan]Exhibit 10.7 to CNS, Inc. Form 8-K dated October 8, 2006

Exhibit 10.7

Amendment of October 8, 2006 to CNS, Inc. 1989 Employee Stock Purchase Plan.

The 2006-2 Phase of the ESPP shall terminate the
earlier of December 31, 2006 or immediately prior to the Effective Time of the Merger, no new employee shall become eligible for
the 2006-02 Phase of the ESPP prior to such termination date, and options under the 2006-2 Phase of the ESPP outstanding as of the
Effective Time be cancelled in exchange for a cash payment equal to the product of: (i) the whole number of shares (rounded down
to the nearest whole number) that the participant would have been entitled to purchase under the ESPP as of the date of
termination of the 2006-2 Phase; and (ii) the excess, if any, of the Merger Consideration over the exercise price of such shares
as determined under Section 8(a)(ii) of the ESPP.EXHIBIT 4.01

                FIRST AMENDMENT TO RIGHTS AGREEMENT

           This FIRST AMENDMENT TO RIGHTS AGREEMENT dated as of August 3, 2006
(the "AMENDMENT") is entered into by and between Reckson Associates Realty
Corp., a Maryland corporation (the "CORPORATION"), and American Stock Transfer &
Trust Company (the "RIGHTS AGENT").

                               W I T N E S S E T H

           WHEREAS, the Corporation and the Rights Agent are parties to that
certain Rights Agreement dated as of October 13, 2000 (the "RIGHTS AGREEMENT");

           WHEREAS, all capitalized terms not otherwise defined herein shall
have the respective meanings assigned to them in the Rights Agreement;

           WHEREAS, Section 27 of the Rights Agreement provides that the
Corporation may amend the Rights Agreement without the approval of any holders
of certificates representing Common Shares;

           WHEREAS, the Affiliate Transaction Committee of the Board of
Directors of the Corporation (the "AFFILIATE TRANSACTION COMMITTEE") approve the
execution, delivery and performance by the Corporation of, and the consummation
of the merger and all other transactions contemplated by, that certain Agreement
and Plan of Merger, dated as of August 3, 2006, by and among the Corporation,
Reckson Operating Partnership, L.P., SL Green Realty Corp., Wyoming Acquisition
Corp., Wyoming Acquisition GP LLC and Wyoming Acquisition Partnership LP,
Reckson Associates Realty Corp. and Reckson Operating Partnership, L.P.; and

           WHEREAS, in contemplation of consummation of the merger and the other
transactions contemplated by the Merger Agreement, the Affiliate Transaction
Committee deems it necessary and desirable and in the best interests of the
Corporation and its shareholders to adopt this Amendment;

           Now, therefore, in consideration of the foregoing and the terms
contained herein, the Rights Agreement is hereby amended as follows:

     Section 1. AMENDMENT OF SECTION 1.

      Section 1 of the Rights Agreement is hereby amended and supplemented to
add the following definitions in the appropriate alphabetical locations:

      "Merger" shall mean the "Merger" as such term is defined in the Merger
Agreement.

      "Merger Agreement" shall mean the Agreement and Plan of Merger, dated as
of August 3, 2006, by and among the Corporation, the Operating Partnership,
Parent, Purchaser, Wyoming Acquisition GP and Wyoming Acquisition LP, as it may
be amended from time to time.

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     "Operating Partnership" means Reckson Operating Partnership, L.P., a
Delaware limited partnership and the operation partnership of the Corporation.

     "Parent" shall mean SL Green Realty Corp., a Maryland corporation.

     "Purchaser" shall mean Wyoming Acquisition Corp., a Maryland corporation, a
wholly-owned subsidiary of Parent.

      "Purchaser Parties" shall mean Parent, Purchaser, Wyoming Acquisition GP
and Wyoming Acquisition LP.

      "Wyoming Acquisition GP" shall mean Wyoming Acquisition GP LLC, a Delaware
limited liability company.

      "Wyoming Acquisition LP" shall mean Wyoming Acquisition Partnership LP, a
Delaware limited partnership.

     Section 2. AMENDMENT OF DEFINITION OF "ACQUIRING PERSON". The definition of
"Acquiring Person" in Section 1 of the Rights Agreement is hereby amended and
supplemented by adding the following sentence at the end thereof:

      "Notwithstanding anything in this Rights Agreement to the contrary,
      neither the Purchaser Parties, nor any of their Affiliates or Associates
      shall be deemed to be an Acquiring Person as a result, directly or
      indirectly, of (i) the approval, execution, delivery or performance of the
      Merger Agreement, (ii) the consummation of the Merger or (iii) the public
      announcement of any of the foregoing."

     Section 3. AMENDMENT OF DEFINITION OF "DISTRIBUTION DATE". The definition
of "Distribution Date" in Section 3(a) of the Rights Agreement is hereby amended
and supplemented by adding the following sentence at the end thereof:

      "Notwithstanding anything in this Rights Agreement to the contrary, a
      Distribution Date shall not be deemed to have occurred solely as the
      result, directly or indirectly, of (i) the approval, execution, delivery
      or performance of the Merger Agreement, (ii) the consummation of the
      Merger or (iii) the public announcement of any of the foregoing."

     Section 4. AMENDMENT OF DEFINITION OF "SHARE ACQUISITION DATE". The
definition of "Share Acquisition Date" in Section 1 of the Rights Agreement is
hereby amended and supplemented by adding the following sentence at the end
thereof:

      "Notwithstanding anything in this Rights Agreement to the contrary, a
      "Share Acquisition Date" shall not be deemed to have occurred solely as
      the result, directly or indirectly, of (i) the approval, execution,
      delivery or performance of the Merger Agreement, (ii) the consummation of
      the Merger or (iii) the public announcement of any of the foregoing."

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     Section 5. AMENDMENT OF SECTION 3. Section 3 of the Rights Agreement is
hereby amended and supplemented by adding the following sentence at the end
thereof as a new Section 3(d):

      "Nothing in this Rights Agreement shall be construed to give any holder of
      Rights or any other Person any legal or equitable rights, remedies or
      claims under this Rights Agreement by virtue of (i) the approval,
      execution, delivery or performance of the Merger Agreement, (ii) the
      consummation of the Merger or (iii) the public announcement of any of the
      foregoing."

     Section 6. AMENDMENT OF SECTION 7(A). Subject to the provisions of Sections
2 through 4 hereof, the Rights Agreement is amended by deleting the word "and"
between "(the "Redemption Date")" and "(iii)" in Section 7(a) of the Rights
Agreement and adding the following to the end of such Section 7(a): "and (iv)
immediately prior to the Effective Time (as defined in the Merger Agreement)."

     Section 7. AMENDMENT OF SECTION 11(A)(II). Section 11(a)(ii) of the Rights
Agreement is amended by adding the following sentence to the end of that
section:

      "Notwithstanding anything else set forth in this Agreement, no event
      requiring an adjustment under this Section 11(a)(ii) shall be deemed to
      have occurred by reason of (i) the approval, execution, delivery or
      performance of the Merger Agreement, (ii) the consummation of the Merger
      or (iii) the public announcement of any of the foregoing."

     Section 8. AMENDMENT TO SECTION 13. Section 13 of the Rights Agreement is
hereby amended and supplemented by adding the following sentence at the end
thereof as a new Section 13(e):

      "Notwithstanding anything to the contrary in this Agreement, the
      provisions of Section 13 of this Agreement shall be deemed not to apply to
      the Merger."

     Section 9. CONDITION TO EFFECTIVENESS. This Amendment is effective as of
immediately prior to the execution and delivery of the Merger Agreement by each
of the parties thereto; provided, however, that if the Merger Agreement is
terminated for any reason, this Amendment shall no longer be applicable or of
any further force and effect. Except as specifically amended by this Amendment,
all other terms and conditions of the Rights Agreement shall remain in full
force and effect and are hereby ratified and confirmed.

     Section 10. REFERENCE TO AND EFFECT ON RIGHTS AGREEMENT. Upon the
effectiveness of this Amendment, each reference in the Rights Agreement to "this
Agreement," "hereunder," "hereof," "herein" or any other expression of like
import referring to the Rights Agreement shall mean and be a reference to the
Rights Agreement as amended by this Amendment.

     Section 11. GOVERNING LAW. Section 32 (Governing Law) of the Rights
Agreement shall apply to this Amendment mutates mutandis.

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<PAGE>

     Section 12. COUNTERPARTS. This Amendment may be executed in any number of
counterparts, each of which shall for all purposes by deemed to be an original,
and all of which shall together constitute but one and the same instrument.

     Section 13. DESCRIPTIVE HEADINGS. Descriptive headings of the several
sections of this Amendment are inserted for convenience only and shall not
control or affect the meaning or construction of any of the provisions hereof.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

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<PAGE>

      IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
duly executed, all as of the date first written above.

                          RECKSON ASSOCIATES REALTY CORP.

                          By:  /s/ Jason Barnett
                             --------------------------------
                              Name:  Jason Barnett
                              Title: Senior Executive Vice President

                          AMERICAN STOCK TRANSFER & TRUST COMPANY

                          By:  /s/ Paula Caroppoli
                             --------------------------------
                             Name:  Paula Caroppoli
                             Title: Vice President

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