Document:

EXHIBIT
10 (ab)

 

 

ENZO
BIOCHEM, INC.

 

AMENDED
AND RESTATED 2011 INCENTIVE PLAN

(as amended and restated effective as of October 7, 2020)

 

1. Purposes;
Adoption and Term.

 

(a) The
purpose of this AMENDED AND RESTATED 2011 INCENTIVE PLAN (the “Plan”) is to assist ENZO BIOCHEM, INC. (the
“Company”) and its Related Entities (as hereinafter defined) in attracting, motivating, retaining and rewarding high-quality
executives and other employees, officers, directors, consultants and other persons who provide services to the Company or its
Related Entities by enabling such persons to acquire or increase a proprietary interest in the Company in order to strengthen
the mutuality of interests between such persons and the Company’s shareholders, and providing such persons with annual and
long term performance incentives to expend their maximum efforts in the creation of shareholder value.

 

(b) The
Plan was originally effective January 14, 2011.  An amended and restated version of the Plan became effective January 5,
2018.  The Plan as amended and restated herein was approved by the Board of Directors of the Company (the “Board”)
on October 7, 2020 and became effective on such date (the “Effective Date”).  The Plan shall remain in effect
until terminated by action of the Board; provided, however, that no Awards or Incentive Stock Options may be granted hereunder
after October 7, 2030.

 

2. Definitions.
For purposes of the Plan, the following terms shall be defined as set forth below, in addition to such terms defined in
Section 1 hereof and elsewhere herein.

 

(a) “Award”
means any Option, Stock Appreciation Right, Restricted Stock Award, Restricted Stock Unit Award, Share granted as a bonus
or in lieu of another Award, Dividend Equivalent, Other Stock-Based Award or Performance Award, together with any other right
or interest, granted to a Participant under the Plan.

 

(b) “Award
Agreement” means any written agreement, contract or other instrument or document evidencing any Award granted by
the Committee hereunder.

 

(c) “Beneficiary”
means the person, persons, trust or trusts that have been designated by a Participant in his or her most recent written
beneficiary designation filed with the Committee to receive the benefits specified under the Plan upon such Participant’s
death or to which Awards or other rights are transferred if and to the extent permitted under Section 9(b) hereof. If, upon a
Participant’s death, there is no designated Beneficiary or surviving designated Beneficiary, then the term Beneficiary
means the person, persons, trust or trusts entitled by will or the laws of descent and distribution to receive such benefits.

 

     

     

    

 

(d) “Beneficial
Owner” and “Beneficial Ownership” shall have the meaning ascribed to such term in Rule 13d-3 under the
Exchange Act and any successor to such Rule.

 

(e) “Board”
means the Company’s Board of Directors.

 

(f) “Change
in Control” means a Change in Control as defined in Section 8(b) of the Plan.

 

(g) “Code”
means the Internal Revenue Code of 1986, as amended from time to time, including regulations thereunder and successor
provisions and regulations thereto.

 

(h) “Committee”
means a committee designated by the Board to administer the Plan; provided, however, that if the Board fails to designate
a committee or if there are no longer any members on the committee so designated by the Board, or for any other reason determined
by the Board, then the Board shall serve as the Committee.

 

(i) “Consultant”
means any Person (other than an Employee or a Director, solely with respect to rendering services in such Person’s
capacity as a director) who is engaged by the Company or any Related Entity to render consulting or advisory services to the Company
or such Related Entity on a full-time basis.

 

(j) “Continuous
Service” means the uninterrupted provision of services to the Company or any Related Entity in any capacity of Employee,
Director, Consultant or other service provider. Continuous Service shall not be considered to be interrupted in the case of (i)
any approved leave of absence, (ii) transfers among the Company, any Related Entities, or any successor entities, in any capacity
of Employee, Director, Consultant or other service provider, or (iii) any change in status as long as the individual remains in
the service of the Company or a Related Entity in any capacity of Employee, Director, Consultant or other service provider (except
as otherwise provided in the Award Agreement). An approved leave of absence shall include sick leave, military leave, or any other
authorized personal leave.

 

(k) “Director”
means a member of the Board.

 

(l) “Disability”
means a permanent and total disability (within the meaning of Section 22(e) of the Code), as determined by a medical doctor
satisfactory to the Committee.

 

(m) “Dividend
Equivalent” means a right, granted to a Participant under Section 6(g) hereof, to receive cash, Shares, other Awards
or other property equal in value to dividends paid with respect to a specified number of Shares, or other periodic payments.

 

(n) “Effective
Date” means the date defined in Section 1(b) above.

 

(o) “Eligible
Person” means each officer, Director, Employee, Consultant and other person who provides services to the Company
or any Related Entity. The foregoing notwithstanding, only Employees of the Company, or any parent corporation or subsidiary corporation
of the Company (as those terms are defined in Sections 424(e) and (f) of the Code, respectively), shall be Eligible Persons for
purposes of receiving any Incentive Stock Options. An Employee on leave of absence may, in the discretion of the Committee, be
considered as still in the employ of the Company or a Related Entity for purposes of eligibility for participation in the Plan.

 

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(p) “Employee”
means any person, including an officer or Director, who is a full-time employee of the Company or any Related Entity.
The payment of a director’s fee by the Company or a Related Entity shall not be sufficient to constitute “employment”
by the Company.

 

(q) “Exchange
Act” means the Securities Exchange Act of 1934, as amended from time to time, including rules thereunder and successor
provisions and rules thereto.

 

(r) “Fair
Market Value” means the fair market value of Shares, Awards or other property as determined by the Committee, or
under procedures established by the Committee. Unless otherwise determined by the Committee, the Fair Market Value of a Share
as of any given date shall be the closing sale price per Share reported on a consolidated basis for stock listed on the principal
stock exchange or market on which Shares are traded on the date as of which such value is being determined (or as of such later
measurement date as determined by the Committee on the date the Award is authorized by the Committee), or, if there is no sale
on that date, then on the last previous day on which a sale was reported.

 

(s) “Incentive
Stock Option” means any Option intended to be designated as an incentive stock option within the meaning of Section
422 of the Code or any successor provision thereto.

 

(t) “Independent”,
when referring to either the Board or members of the Committee, shall have the same meaning as used in the rules of the
Listing Market.

 

(u) “Incumbent
Board” means the Incumbent Board as defined in Section 8(b)(ii) hereof.

 

(v) “Listing
Market” means any national securities exchange on which any securities of the Company are listed for trading, and
if not listed for trading, by the rules of the Nasdaq Market.

 

(w) “Option”
means a right granted to a Participant under Section 6(b) hereof, to purchase Shares or other Awards at a specified price
during specified time periods.

 

(x) “Optionee”
means a person to whom an Option is granted under this Plan or any person who succeeds to the rights of such person under
this Plan.

 

(y) “Other
Stock-Based Awards” means Awards granted to a Participant under Section 6(i) hereof.

 

(z) “Participant”
means a person who has been granted an Award under the Plan which remains outstanding, including a person who is no longer
an Eligible Person.

 

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(aa) “Performance
Award” means any Award of Performance Shares or Performance Units granted pursuant to Section 6(h) hereof.

 

(bb) “Performance
Period” means that period established by the Committee at the time any Performance Award is granted or at any time
thereafter during which any performance goals specified by the Committee with respect to such Award are to be measured.

 

(cc) “Performance
Share” means any grant pursuant to Section 6(h) hereof of a unit valued by reference to a designated number of Shares,
which value may be paid to the Participant by delivery of such property as the Committee shall determine, including cash, Shares,
other property, or any combination thereof, upon achievement of such performance goals during the Performance Period as the Committee
shall establish at the time of such grant or thereafter.

 

(dd) “Performance
Unit” means any grant pursuant to Section 6(h) hereof of a unit valued by reference to a designated amount of property
(including cash) other than Shares, which value may be paid to the Participant by delivery of such property as the Committee shall
determine, including cash, Shares, other property, or any combination thereof, upon achievement of such performance goals during
the Performance Period as the Committee shall establish at the time of such grant or thereafter.

 

(ee) “Person”
shall have the meaning ascribed to such term in Section 3(a)(9) of the Exchange Act and used in Sections 13(d) and 14(d)
thereof, and shall include a “group” as defined in Section 13(d) thereof.

 

(ff) “Related
Entity” means any Subsidiary, and any business, corporation, partnership, limited liability company or other entity
designated by the Board, in which the Company or a Subsidiary holds a substantial ownership interest, directly or indirectly.

 

(gg) “Restriction
Period” means the period of time specified by the Committee that Restricted Stock Awards shall be subject to such
restrictions on transferability, risk of forfeiture and other restrictions, if any, as the Committee may impose.

 

(hh) “Restricted
Stock” means any Share issued with the restriction that the holder may not sell, transfer, pledge or assign such
Share and with such risks of forfeiture and other restrictions as the Committee, in its sole discretion, may impose (including
any restriction on the right to vote such Share and the right to receive any dividends), which restrictions may lapse separately
or in combination at such time or times, in installments or otherwise, as the Committee may deem appropriate.

 

(ii) “Restricted
Stock Award” means an Award granted to a Participant under Section 6(d) hereof.

 

(jj) “Restricted
Stock Units” means a right to receive Shares, including Restricted Stock, cash measured based upon the value of
Shares or a combination thereof, at the end of a specified deferral period.

 

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(kk) “Restricted
Stock Unit Award” means an Award of Restricted Stock Units granted to a Participant under Section 6(e) hereof.

 

(ll) “Rule
16b-3” means Rule 16b-3, as from time to time in effect and applicable to the Plan and Participants, promulgated
by the Securities and Exchange Commission under Section 16 of the Exchange Act.

 

(mm) “Shares”
means the shares of common stock of the Company, par value $0.01 per share, and such other securities as may be substituted
(or resubstituted) for Shares pursuant to Section 9(c) hereof.

 

(nn) “Stock
Appreciation Right” means a right granted to a Participant under Section 6(c) hereof.

 

(oo) “Subsidiary”
means any corporation or other entity in which the Company has a direct or indirect ownership interest of 50% or more
of the total combined voting power of the then outstanding securities or interests of such corporation or other entity entitled
to vote generally in the election of directors or in which the Company has the right to receive 50% or more of the distribution
of profits or 50% or more of the assets on liquidation or dissolution.

 

(pp) “Substitute
Awards” means Awards granted or Shares issued by the Company in assumption of, or in substitution or exchange for,
Awards previously granted, or the right or obligation to make future Awards, by a company (i) acquired by the Company or any Related
Entity, (ii) which becomes a Related Entity after the date hereof, or (iii) with which the Company or any Related Entity combines.

 

3. Administration.

 

(a) Authority
of the Committee. The Plan shall be administered by the Committee, except to the extent (and subject to the limitations
imposed by Section 3(b) hereof) the Board elects to administer the Plan, in which case the Plan shall be administered by only
those members of the Board who are Independent members of the Board, in which case references herein to the “Committee”
shall be deemed to include references to the Independent members of the Board. The Committee shall have full and final authority,
subject to and consistent with the provisions of the Plan, to select Eligible Persons to become Participants, grant Awards, determine
the type, number and other terms and conditions of, and all other matters relating to, Awards, prescribe Award Agreements (which
need not be identical for each Participant) and rules and regulations for the administration of the Plan, construe and interpret
the Plan and Award Agreements and correct defects, supply omissions or reconcile inconsistencies therein, and to make all other
decisions and determinations as the Committee may deem necessary or advisable for the administration of the Plan. In exercising
any discretion granted to the Committee under the Plan or pursuant to any Award, the Committee shall not be required to follow
past practices, act in a manner consistent with past practices, or treat any Eligible Person or Participant in a manner consistent
with the treatment of any other Eligible Persons or Participants.

 

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(b) Manner
of Exercise of Committee Authority. The Committee, and not the Board, shall exercise sole and exclusive discretion
(i) on any matter relating to a Participant then subject to Section 16 of the Exchange Act with respect to the Company to the
extent necessary in order that transactions by such Participant shall be exempt under Rule 16b-3 under the Exchange Act, and (ii)
with respect to any Award to an Independent Director. Any action of the Committee shall be final, conclusive and binding on all
persons, including the Company, its Related Entities, Eligible Persons, Participants, Beneficiaries, transferees under Section
9(b) hereof or other persons claiming rights from or through a Participant, and shareholders. The express grant of any specific
power to the Committee, and the taking of any action by the Committee, shall not be construed as limiting any power or authority
of the Committee. The Committee may delegate to officers or managers of the Company or any Related Entity, or committees thereof,
the authority, subject to such terms and limitations as the Committee shall determine, to perform such functions, including administrative
functions as the Committee may determine to the extent that such delegation will not result in the loss of an exemption under
Rule 16b-3(d)(1) for Awards granted to Participants subject to Section 16 of the Exchange Act in respect of the Company. The Committee
may appoint agents to assist it in administering the Plan.

 

(c) Limitation
of Liability. The Committee and the Board, and each member thereof, shall be entitled to, in good faith, rely or act upon
any report or other information furnished to him or her by any officer or Employee, the Company’s independent auditors,
Consultants or any other agents assisting in the administration of the Plan. Members of the Committee and the Board, and any officer
or Employee acting at the direction or on behalf of the Committee or the Board, shall not be personally liable for any action
or determination taken or made in good faith with respect to the Plan, and shall, to the extent permitted by law, be fully indemnified
and protected by the Company with respect to any such action or determination.

 

4. Shares
Subject to Plan.

 

(a) Limitation
on Overall Number of Shares Available for Delivery Under Plan. Subject to adjustment as provided in Section 9(c) hereof,
the total number of Shares reserved and available for delivery under the Plan shall be Nine Million (9,000,000). Any Shares that
are subject to Awards shall be counted against this limit as one (1) Share for every one (1) Share granted. Any Shares delivered
under the Plan may consist, in whole or in part, of authorized and unissued shares or treasury shares.

 

(b) Application
of Limitation to Grants of Awards. No Award may be granted if the number of Shares to be delivered in connection
with such an Award exceeds the number of Shares remaining available for delivery under the Plan, minus the number of Shares deliverable
in settlement of or relating to then outstanding Awards. The Committee may adopt reasonable counting procedures to ensure appropriate
counting, avoid double counting (as, for example, in the case of tandem or substitute awards) and make adjustments if the number
of Shares actually delivered differs from the number of Shares previously counted in connection with an Award.

 

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(c) Availability
of Shares Not Delivered Under Awards and Adjustments to Limits.

 

(i) If
any Awards are forfeited, expire or otherwise terminate without issuance of such Shares, or any Award is settled for cash or otherwise
does not result in the issuance of all or a portion of the Shares subject to such Award, the Shares to which those Awards were
subject, shall, to the extent of such forfeiture, expiration, termination, cash settlement or non-issuance, again be available
for delivery with respect to Awards under the Plan.

 

(ii) In
the event that any Option or other Award granted hereunder is exercised through the tendering of Shares (either actually or by
attestation) or by the withholding of Shares by the Company, or withholding tax liabilities arising from such option or other
award are satisfied by the tendering of Shares (either actually or by attestation) or by the withholding of Shares by the Company,
then only the number of Shares issued net of the Shares tendered or withheld shall be counted for purposes of determining the
maximum number of Shares available for grant under the Plan.

 

(iii) Substitute
Awards shall not reduce the Shares authorized for delivery under the Plan or authorized for delivery to a Participant in any period.
Additionally, in the event that a company acquired by the Company or any Related Entity or with which the Company or any Related
Entity combines has shares available under a pre-existing plan approved by its shareholders, the shares available for delivery
pursuant to the terms of such pre-existing plan (as adjusted, to the extent appropriate, using the exchange ratio or other adjustment
or valuation ratio or formula used in such acquisition or combination to determine the consideration payable to the holders of
common stock of the entities party to such acquisition or combination) may be used for Awards under the Plan and shall not reduce
the Shares authorized for delivery under the Plan; if and to the extent that the use of such Shares would not require approval
of the Company’s shareholders under the rules of the Listing Market.

 

(iv) Any
Share that again becomes available for delivery pursuant to this Section 4(c) shall be added back as one (1) Share.

 

(v) Notwithstanding
anything in this Section 4(c) to the contrary but subject to adjustment as provided in Section 9(c) hereof, the maximum aggregate
number of Shares that may be delivered under the Plan as a result of the exercise of the Incentive Stock Options shall be Nine
Million (9,000,000) Shares.

 

5. Eligibility;
Per-Person Award Limitations. Awards may be granted under the Plan only to Eligible Persons. Subject to adjustment as
provided in Section 9(c), in any fiscal year of the Company during any part of which the Plan is in effect, No Participant
may be granted (i) Options or Stock Appreciation Rights with respect to more than Five Hundred Thousand (500,000) Shares or (ii)
Restricted Stock, Restricted Stock Units, Performance Shares and/or Other Stock-Based Awards with respect to more than Five Hundred
Thousand (500,000) Shares. In addition, the maximum dollar value payable to any one Participant with respect to Performance Units
is (x) Two Million Five Hundred Thousand Dollars ($2,500,000) with respect to any 12 month Performance Period (pro-rated for any
Performance Period that is less than 12 months based upon the ratio of the number of days in the Performance Period as compared
to 365), and (y) with respect to any Performance Period that is more than 12 months, Two Million Dollars ($2,000,000) multiplied
by the number of full 12 month periods that are in the Performance Period.

 

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6. Specific
Terms of Awards.

 

(a) General.
Awards may be granted on the terms and conditions set forth in this Section 6. In addition, the Committee may impose on any Award
or the exercise thereof, at the date of grant or thereafter (subject to Section 9(e)), such additional terms and conditions, not
inconsistent with the provisions of the Plan, as the Committee shall determine, including terms requiring forfeiture of Awards
in the event of termination of the Participant’s Continuous Service and terms permitting a Participant to make elections
relating to his or her Award. Except as otherwise expressly provided herein, the Committee shall retain full power and discretion
to accelerate, waive or modify, at any time, any term or condition of an Award that is not mandatory under the Plan. Except in
cases in which the Committee is authorized to require other forms of consideration under the Plan, or to the extent other forms
of consideration must be paid to satisfy the requirements of New York law, no consideration other than services may be required
for the grant (as opposed to the exercise) of any Award.

 

(b) Options.
The Committee is authorized to grant Options to any Eligible Person on the following terms and conditions:

 

(i) Exercise
Price. Other than in connection with Substitute Awards, the exercise price per Share purchasable under an Option shall
be determined by the Committee, provided that such exercise price shall not be less than 100% of the Fair Market Value of a Share
on the date of grant of the Option and shall not, in any event, be less than the par value of a Share on the date of grant of
the Option. If an Employee owns or is deemed to own (by reason of the attribution rules applicable under Section 424(d) of the
Code) more than 10% of the combined voting power of all classes of stock of the Company (or any parent corporation or subsidiary
corporation of the Company, as those terms are defined in Sections 424(e) and (f) of the Code, respectively) and an Incentive
Stock Option is granted to such Employee, the exercise price of such Incentive Stock Option (to the extent required by the Code
at the time of grant) shall be no less than 110% of the Fair Market Value of a Share on the date such Incentive Stock Option
is granted. Other than pursuant to Section 9(c)(i) and (ii), the Committee shall not be permitted to (A) lower the exercise price
per Share of an Option after it is granted, (B) cancel an Option when the exercise price per Share exceeds the Fair Market Value
of the underlying Shares in exchange for another Award (other than in connection with Substitute Awards), or (C) take any other
action with respect to an Option that may be treated as a repricing pursuant to the applicable rules of the Listing Market, without
approval of the Company’s shareholders.

 

(ii) Time
and Method of Exercise. The Committee shall determine the time or times at which or the circumstances under which an Option
may be exercised in whole or in part (including based on achievement of performance goals and/or future service requirements),
the time or times at which Options shall cease to be or become exercisable following termination of Continuous Service or upon
other conditions, the methods by which the exercise price may be paid or deemed to be paid (including in the discretion of the
Committee a cashless exercise procedure), the form of such payment, including, without limitation, cash, Shares (including without
limitation the withholding of Shares otherwise deliverable pursuant to the Award), other Awards or awards granted under other
plans of the Company or a Related Entity, or other property (including notes or other contractual obligations of Participants
to make payment on a deferred basis provided that such deferred payments are not in violation of Section 13(k) of the Exchange
Act, or any rule or regulation adopted thereunder or any other applicable law), and the methods by or forms in which Shares will
be delivered or deemed to be delivered to Participants.

 

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(iii) Incentive
Stock Options. The terms of any Incentive Stock Option granted under the Plan shall comply in all respects with the provisions
of Section 422 of the Code. Anything in the Plan to the contrary notwithstanding, no term of the Plan relating to Incentive
Stock Options (including any Stock Appreciation Right issued in tandem therewith) shall be interpreted, amended or altered, nor
shall any discretion or authority granted under the Plan be exercised, so as to disqualify either the Plan or any Incentive Stock
Option under Section 422 of the Code, unless the Participant has first requested, or consents to, the change that will result
in such disqualification. Thus, if and to the extent required to comply with Section 422 of the Code, Options granted as Incentive
Stock Options shall be subject to the following special terms and conditions:

 

(A) the
Option shall not be exercisable for more than ten years after the date such Incentive Stock Option is granted; provided, however,
that if a Participant owns or is deemed to own (by reason of the attribution rules of Section 424(d) of the Code) more than 10%
of the combined voting power of all classes of stock of the Company (or any parent corporation or subsidiary corporation of the
Company, as those terms are defined in Sections 424(e) and (f) of the Code, respectively) and the Incentive Stock Option is granted
to such Participant, the term of the Incentive Stock Option shall be (to the extent required by the Code at the time of the grant)
for no more than five years from the date of grant; and

 

(B) The
aggregate Fair Market Value (determined as of the date the Incentive Stock Option is granted) of the Shares with respect to which
Incentive Stock Options granted under the Plan and all other option plans of the Company (and any parent corporation or subsidiary
corporation of the Company, as those terms are defined in Sections 424(e) and (f) of the Code, respectively) that become exercisable
for the first time by the Participant during any calendar year shall not (to the extent required by the Code at the time of the
grant) exceed $100,000.

 

(c) Stock
Appreciation Rights. The Committee may grant Stock Appreciation Rights to any Eligible Person in conjunction with all
or part of any Option granted under the Plan or at any subsequent time during the term of such Option (a “Tandem Stock Appreciation
Right”), or without regard to any Option (a “Freestanding Stock Appreciation Right”), in each case upon such
terms and conditions as the Committee may establish in its sole discretion, not inconsistent with the provisions of the Plan,
including the following:

 

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(i) Right
to Payment. A Stock Appreciation Right shall confer on the Participant to whom it is granted a right to receive, upon
exercise thereof, the excess of (A) the Fair Market Value of one Share on the date of exercise over (B) the grant price of the
Stock Appreciation Right as determined by the Committee. The grant price of a Stock Appreciation Right shall not be less than
100% of the Fair Market Value of a Share on the date of grant, in the case of a Freestanding Stock Appreciation Right, or less
than the associated Option exercise price, in the case of a Tandem Stock Appreciation Right. Other than pursuant to Section 9(c)(i)
and (ii), the Committee shall not be permitted to (A) lower the grant price per Share of a Stock Appreciation Right after it is
granted, (B) cancel a Stock Appreciation Right when the grant price per Share exceeds the Fair Market Value of the underlying
Shares in exchange for another Award (other than in connection with Substitute Awards), or (C) take any other action with respect
to a Stock Appreciation Right that may be treated as a repricing pursuant to the applicable rules of the Listing Market, without
shareholder approval.

 

(ii) Other
Terms. The Committee shall determine at the date of grant or thereafter, the time or times at which and the circumstances
under which a Stock Appreciation Right may be exercised in whole or in part (including based on achievement of performance goals
and/or future service requirements), the time or times at which Stock Appreciation Rights shall cease to be or become exercisable
following termination of Continuous Service or upon other conditions, the method of exercise, method of settlement, form of consideration
payable in settlement, method by or forms in which Shares will be delivered or deemed to be delivered to Participants, whether
or not a Stock Appreciation Right shall be in tandem or in combination with any other Award, and any other terms and conditions
of any Stock Appreciation Right.

 

(iii) Tandem
Stock Appreciation Rights. Any Tandem Stock Appreciation Right may be granted at the same time as the related Option is
granted or, for Options that are not Incentive Stock Options, at any time thereafter before exercise or expiration of such Option.
Any Tandem Stock Appreciation Right related to an Option may be exercised only when the related Option would be exercisable and
the Fair Market Value of the Shares subject to the related Option exceeds the exercise price at which Shares can be acquired pursuant
to the Option. In addition, if a Tandem Stock Appreciation Right exists with respect to less than the full number of Shares covered
by a related Option, then an exercise or termination of such Option shall not reduce the number of Shares to which the Tandem
Stock Appreciation Right applies until the number of Shares then exercisable under such Option equals the number of Shares to
which the Tandem Stock Appreciation Right applies. Any Option related to a Tandem Stock Appreciation Right shall no longer
be exercisable to the extent the Tandem Stock Appreciation Right has been exercised, and any Tandem Stock Appreciation Right shall
no longer be exercisable to the extent the related Option has been exercised.

 

(d) Restricted
Stock Awards. The Committee is authorized to grant Restricted Stock Awards to any Eligible Person on the following terms
and conditions:

 

(i) Grant
and Restrictions. Restricted Stock Awards shall be subject to such restrictions on transferability, risk of forfeiture
and other restrictions, if any, as the Committee may impose, or as otherwise provided in this Plan during the Restriction Period.
The terms of any Restricted Stock Award granted under the Plan shall be set forth in a written Award Agreement which shall contain
provisions determined by the Committee and not inconsistent with the Plan. The restrictions may lapse separately or in combination
at such times, under such circumstances (including based on achievement of performance goals and/or future service requirements),
in such installments or otherwise, as the Committee may determine at the date of grant or thereafter. Except to the extent restricted
under the terms of the Plan and any Award Agreement relating to a Restricted Stock Award, a Participant granted Restricted Stock
shall have all of the rights of a shareholder, including the right to vote the Restricted Stock and the right to receive dividends
thereon (subject to any mandatory reinvestment or other requirement imposed by the Committee). During the period that the Restriction
Stock Award is subject to a risk of forfeiture, subject to Section 9(b) below and except as otherwise provided in the Award Agreement,
the Restricted Stock may not be sold, transferred, pledged, hypothecated, margined or otherwise encumbered by the Participant.

 

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(ii) Forfeiture.
Except as otherwise determined by the Committee, upon termination of a Participant’s Continuous Service during the applicable
Restriction Period, the Participant’s Restricted Stock that is at that time subject to a risk of forfeiture that has not
lapsed or otherwise been satisfied shall be forfeited and reacquired by the Company; provided that the Committee may provide,
by rule or regulation or in any Award Agreement, or may determine in any individual case, that forfeiture conditions relating
to Restricted Stock Awards shall be waived in whole or in part in the event of terminations resulting from specified causes, and
the Committee may in other cases waive in whole or in part the forfeiture of Restricted Stock.

 

(iii) Certificates
for Stock. Restricted Stock granted under the Plan may be evidenced in such manner as the Committee shall determine. If
certificates representing Restricted Stock are registered in the name of the Participant, the Committee may require that such
certificates bear an appropriate legend referring to the terms, conditions and restrictions applicable to such Restricted Stock,
that the Company retain physical possession of the certificates, and that the Participant deliver a stock power to the Company,
endorsed in blank, relating to the Restricted Stock.

 

(iv) Dividends
and Splits. As a condition to the grant of a Restricted Stock Award, the Committee may require or permit a Participant
to elect that any cash dividends paid on a Share of Restricted Stock be automatically reinvested in additional Shares of Restricted
Stock or applied to the purchase of additional Awards under the Plan. Unless otherwise determined by the Committee, Shares distributed
in connection with a stock split or stock dividend, and other property distributed as a dividend, shall be subject to restrictions
and a risk of forfeiture to the same extent as the Restricted Stock with respect to which such Shares or other property have been
distributed.

 

(e) Restricted
Stock Unit Award. The Committee is authorized to grant Restricted Stock Unit Awards to any Eligible Person on the following
terms and conditions:

 

(i) Award
and Restrictions. Satisfaction of a Restricted Stock Unit Award shall occur upon expiration of the deferral period specified
for such Restricted Stock Unit Award by the Committee (or, if permitted by the Committee, as elected by the Participant). In addition,
a Restricted Stock Unit Award shall be subject to such restrictions (which may include a risk of forfeiture) as the Committee
may impose, if any, which restrictions may lapse at the expiration of the deferral period or at earlier specified times (including
based on achievement of performance goals and/or future service requirements), separately or in combination, in installments or
otherwise, as the Committee may determine. A Restricted Stock Unit Award may be satisfied by delivery of Shares, cash equal to
the Fair Market Value of the specified number of Shares covered by the Restricted Stock Units, or a combination thereof, as determined
by the Committee at the date of grant or thereafter. Prior to satisfaction of a Restricted Stock Unit Award, a Restricted Stock
Unit Award carries no voting or dividend or other rights associated with Share ownership.

 

    	 	11	 

     

    

 

(ii) Forfeiture.
Except as otherwise determined by the Committee, upon termination of a Participant’s Continuous Service during the applicable
deferral period or portion thereof to which forfeiture conditions apply (as provided in the Award Agreement evidencing the Restricted
Stock Unit Award), the Participant’s Restricted Stock Unit Award that is at that time subject to a risk of forfeiture that
has not lapsed or otherwise been satisfied shall be forfeited; provided that the Committee may provide, by rule or regulation
or in any Award Agreement, or may determine in any individual case, that forfeiture conditions relating to a Restricted Stock
Unit Award shall be waived in whole or in part in the event of terminations resulting from specified causes, and the Committee
may in other cases waive in whole or in part the forfeiture of any Restricted Stock Unit Award.

 

(iii) Dividend
Equivalents. Unless otherwise determined by the Committee at the date of grant, any Dividend Equivalents that are granted
with respect to any Restricted Stock Unit Award shall be either (A) paid with respect to such Restricted Stock Unit Award at the
dividend payment date in cash or in Shares of unrestricted stock having a Fair Market Value equal to the amount of such dividends,
or (B) deferred with respect to such Restricted Stock Unit Award and the amount or value thereof automatically deemed reinvested
in additional Restricted Stock Units, other Awards or other investment vehicles, as the Committee shall determine or permit the
Participant to elect. The applicable Award Agreement shall specify whether any Dividend Equivalents shall be paid at the dividend
payment date, deferred or deferred at the election of the Participant. If the Participant may elect to defer the Dividend Equivalents,
such election shall be made within 30 days after the grant date of the Restricted Stock Unit Award, but in no event later
than 12 months before the first date on which any portion of such Restricted Stock Unit Award vests (or at such other times prescribed
by the Committee as shall not result in a violation of Section 409A of the Code).

 

(f) Bonus
Stock and Awards in Lieu of Obligations. The Committee is authorized to grant Shares to any Eligible Persons as a bonus,
or to grant Shares or other Awards in lieu of obligations to pay cash or deliver other property under the Plan or under other
plans or compensatory arrangements, provided that, in the case of Eligible Persons subject to Section 16 of the Exchange Act,
the amount of such grants remains within the discretion of the Committee to the extent necessary to ensure that acquisitions of
Shares or other Awards are exempt from liability under Section 16(b) of the Exchange Act. Shares or Awards granted hereunder shall
be subject to such other terms as shall be determined by the Committee.

 

(g) Dividend
Equivalents. The Committee is authorized to grant Dividend Equivalents to any Eligible Person entitling the Eligible Person
to receive cash, Shares, other Awards, or other property equal in value to the regular dividends paid with respect to a specified
number of Shares, or other periodic payments. Dividend Equivalents may be awarded on a free-standing basis or in connection with
another Award. The Committee may provide that Dividend Equivalents shall be paid or distributed when accrued or shall be deemed
to have been reinvested in additional Shares, Awards, or other investment vehicles, and subject to such restrictions on transferability
and risks of forfeiture, as the Committee may specify. Any such determination by the Committee shall be made at the grant date
of the applicable Award.

 

    	 	12	 

     

    

 

(h) Performance
Awards. The Committee is authorized to grant Performance Awards to any Eligible Person payable in cash, Shares, or other
Awards, on terms and conditions established by the Committee, subject to the provisions of Section 8 if and to the extent that
the Committee shall, in its sole discretion, determine that an Award shall be subject to those provisions. The performance criteria
to be achieved during any Performance Period and the length of the Performance Period shall be determined by the Committee upon
the grant of each Performance Award. Except as provided in Section 8 or as may be provided in an Award Agreement, Performance
Awards will be distributed only after the end of the relevant Performance Period. The performance goals to be achieved for each
Performance Period shall be conclusively determined by the Committee and may be based upon the criteria set forth in Section 8(b),
or in the case of an Award that the Committee determines shall not be subject to Section 8 hereof, any other criteria that the
Committee, in its sole discretion, shall determine should be used for that purpose. The amount of the Award to be distributed
shall be conclusively determined by the Committee. Performance Awards may be paid in a lump sum or in installments following the
close of the Performance Period or, in accordance with procedures established by the Committee, on a deferred basis in a manner
that does not violation the requirements of Section 409A of the Code.

 

(i) Other
Stock-Based Awards. The Committee is authorized, subject to limitations under applicable law, to grant to any Eligible
Person such other Awards that may be denominated or payable in, valued in whole or in part by reference to, or otherwise based
on, or related to, Shares, as deemed by the Committee to be consistent with the purposes of the Plan. Other Stock-Based Awards
may be granted to Participants either alone or in addition to other Awards granted under the Plan, and such Other Stock-Based
Awards shall also be available as a form of payment in the settlement of other Awards granted under the Plan. The Committee shall
determine the terms and conditions of such Awards. Shares delivered pursuant to an Award in the nature of a purchase right granted
under this Section 6(i) shall be purchased for such consideration, (including without limitation loans from the Company or a Related
Entity provided that such loans are not in violation of Section 13(k) of the Exchange Act, or any rule or regulation adopted thereunder
or any other applicable law) paid for at such times, by such methods, and in such forms, including, without limitation, cash,
Shares, other Awards or other property, as the Committee shall determine.

 

7. Certain
Provisions Applicable to Awards.

 

(a) Stand-Alone,
Additional, Tandem, and Substitute Awards. Awards granted under the Plan may, in the discretion of the Committee, be granted
either alone or in addition to, in tandem with, or in substitution or exchange for, any other Award or any award granted under
another plan of the Company, any Related Entity, or any business entity to be acquired by the Company or a Related Entity, or
any other right of a Participant to receive payment from the Company or any Related Entity. Such additional, tandem, and substitute
or exchange Awards may be granted at any time. If an Award is granted in substitution or exchange for another Award or award,
the Committee shall require the surrender of such other Award or award in consideration for the grant of the new Award. In addition,
Awards may be granted in lieu of cash compensation, including in lieu of cash amounts payable under other plans of the Company
or any Related Entity, in which the value of Shares subject to the Award is equivalent in value to the cash compensation (for
example, Restricted Stock or Restricted Stock Units), or in which the exercise price, grant price or purchase price of the Award
in the nature of a right that may be exercised is equal to the Fair Market Value of the underlying Shares minus the value of the
cash compensation surrendered (for example, Options or Stock Appreciation Right granted with an exercise price or grant price
“discounted” by the amount of the cash compensation surrendered), provided that any such determination to grant an
Award in lieu of cash compensation must be made in compliance with Section 409A of the Code.

 

    	 	13	 

     

    

 

(b) Term
of Awards. The term of each Award shall be for such period as may be determined by the Committee; provided that in no event
shall the term of any Option or Stock Appreciation Right exceed a period of ten years (or in the case of an Incentive Stock Option
such shorter term as may be required under Section 422 of the Code).

 

(c) Form
and Timing of Payment Under Awards; Deferrals. Subject to the terms of the Plan and any applicable Award Agreement, payments
to be made by the Company or a Related Entity upon the exercise of an Option or other Award or settlement of an Award may be made
in such forms as the Committee shall determine, including, without limitation, cash, Shares, other Awards or other property, and
may be made in a single payment or transfer, in installments, or on a deferred basis, provided that any determination to pay in
installments or on a deferred basis shall be made by the Committee at the date of grant. Any installment or deferral provided
for in the preceding sentence shall, however, be subject to the Company’s compliance with applicable law and all applicable
rules of the Listing Market, and in a manner intended to be exempt from or otherwise satisfy the requirements of Section 409A
of the Code. Subject to Section 7(e) hereof, the settlement of any Award may be accelerated, and cash paid in lieu of Shares in
connection with such settlement, in the sole discretion of the Committee or upon occurrence of one or more specified events (in
addition to a Change in Control). Any such settlement shall be at a value determined by the Committee in its sole discretion,
which, without limitation, may in the case of an Option or Stock Appreciation Right be limited to the amount if any by which the
Fair Market Value of a Share on the settlement date exceeds the exercise or grant price. Installment or deferred payments may
be required by the Committee (subject to Section 7(e) of the Plan, including the consent provisions thereof in the case of any
deferral of an outstanding Award not provided for in the original Award Agreement) or permitted at the election of the Participant
on terms and conditions established by the Committee. The Committee may, without limitation, make provision for the payment or
crediting of a reasonable interest rate on installment or deferred payments or the grant or crediting of Dividend Equivalents
or other amounts in respect of installment or deferred payments denominated in Shares.

 

(d) Exemptions
from Section 16(b) Liability. It is the intent of the Company that the grant of any Awards to or other transaction by
a Participant who is subject to Section 16 of the Exchange Act shall be exempt from Section 16 pursuant to an applicable exemption
(except for transactions acknowledged in writing to be non-exempt by such Participant). Accordingly, if any provision of this
Plan or any Award Agreement does not comply with the requirements of Rule 16b-3 then applicable to any such transaction, such
provision shall be construed or deemed amended to the extent necessary to conform to the applicable requirements of Rule 16b-3
so that such Participant shall avoid liability under Section 16(b).

 

    	 	14	 

     

    

 

(e) Code
Section 409A.

 

(i) The
Award Agreement for any Award that the Committee reasonably determines to constitute a Section 409A Plan, as defined in Section
7(e)(ii) hereof, and the provisions of the Plan applicable to that Award, shall be construed in a manner consistent with the applicable
requirements of Section 409A, and the Committee, in its sole discretion and without the consent of any Participant, may amend
any Award Agreement (and the provisions of the Plan applicable thereto) if and to the extent that the Committee determines that
such amendment is necessary or appropriate to comply with the requirements of Section 409A of the Code.

 

(ii) If
any Award constitutes a “nonqualified deferred compensation plan” under Section 409A of the Code (a “Section
409A Plan”), then the Award shall be subject to the following additional requirements, if and to the extent required to
comply with Section 409A of the Code:

 

(A) Payments
under the Section 409A Plan may not be made earlier than the first to occur of (u) the Participant’s “separation from
service”, (v) the date the Participant becomes “disabled”, (w) the Participant’s death, (x) a “specified
time (or pursuant to a fixed schedule)” specified in the Award Agreement at the date of the deferral of such compensation,
(y) a “change in the ownership or effective control of the corporation, or in the ownership of a substantial portion of
the assets” of the Company, or (z) the occurrence of an “unforeseeable emergency”;

 

(B) The
time or schedule for any payment of the deferred compensation may not be accelerated, except to the extent provided in applicable
Treasury Regulations or other applicable guidance issued by the Internal Revenue Service;

 

(C) Any
elections with respect to the deferral of such compensation or the time and form of distribution of such deferred compensation
shall comply with the requirements of Section 409A(a)(4) of the Code; and

 

(D) In
the case of any Participant who is “specified employee”, a distribution on account of a “separation from service”
may not be made before the date which is six months after the date of the Participant’s “separation from service”
(or, if earlier, the date of the Participant’s death).

 

For
purposes of the foregoing, the terms in quotations shall have the same meanings as those terms have for purposes of Section 409A
of the Code, and the limitations set forth herein shall be applied in such manner (and only to the extent) as shall be necessary
to comply with any requirements of Section 409A of the Code that are applicable to the Award.

 

    	 	15	 

     

    

 

(iii) Notwithstanding
the foregoing, or any provision of this Plan or any Award Agreement, the Company does not make any representation to any Participant
or Beneficiary that any Awards made pursuant to this Plan are exempt from, or satisfy, the requirements of, Section 409A, and
the Company shall have no liability or other obligation to indemnify or hold harmless the Participant or any Beneficiary
for any tax, additional tax, interest or penalties that the Participant or any Beneficiary may incur in the event that any provision
of this Plan, or any Award Agreement, or any amendment or modification thereof, or any other action taken with respect thereto,
is deemed to violate any of the requirements of Section 409A.

 

(f) Grandfathered
Awards. No provision of this amendment and restatement shall apply to any Award granted prior to the Effective Date that
would otherwise be grandfathered from the changes to eliminate the “performance-based compensation” exemption to Section
162(m) of the Code to the extent any such provision would result in a material modification under IRS regulations or guidance.

 

8. Change
in Control.

 

(a) Effect
of “Change in Control.” If and only to the extent provided in any employment or other agreement between the
Participant and the Company or any Related Entity, or in any Award Agreement, or to the extent otherwise determined by the Committee
in its sole discretion and without any requirement that each Participant be treated consistently, upon the occurrence of a “Change
in Control,” as defined in Section 8(b):

 

(i) Any
Option or Stock Appreciation Right that was not previously vested and exercisable as of the time of the Change in Control, shall
become immediately vested and exercisable, subject to applicable restrictions set forth in Section 9(a) hereof.

 

(ii) Any
restrictions, deferral of settlement, and forfeiture conditions applicable to a Restricted Stock Award, Restricted Stock Unit
Award or an Other Stock-Based Award subject only to future service requirements granted under the Plan shall lapse and such Awards
shall be deemed fully vested as of the time of the Change in Control, except to the extent of any waiver by the Participant and
subject to applicable restrictions set forth in Section 9(a) hereof.

(iii) With
respect to any outstanding Award subject to achievement of performance goals and conditions under the Plan, the Committee may,
in its discretion, deem such performance goals and conditions as having been met as of the date of the Change in Control.

 

(iv) Notwithstanding
the foregoing or any provision in any Award Agreement to the contrary, and unless the Committee otherwise determines in a specific
instance or as is provided in any employment or other agreement between the Participant and the Company or any Related Entity,
each outstanding Option, Stock Appreciation Right, Restricted Stock Award, Restricted Stock Unit Award or Other Stock-Based Award
shall not be accelerated as described in Sections 9(a)(i), (ii) and (iii), if either (A) the Company is the surviving entity in
the Change in Control and the Option, Stock Appreciation Right, Restricted Stock Award, Restricted Stock Unit Award or Other Stock-Based
Award continues to be outstanding after the Change in Control on the substantially same terms and conditions as were applicable
immediately prior to the Change in Control or (B) the successor company assumes or substitutes for the applicable Award, as determined
in accordance with Section 9(c)(ii) hereof.

 

    	 	16	 

     

    

 

(b) Definition
of “Change in Control”. A “Change in Control” shall mean the occurrence of any of the following:

 

(i) The
acquisition by any Person of Beneficial Ownership (within the meaning of Rule 13d-3 promulgated under the Exchange Act) of more
than fifty percent (50%) of either (A) the value of then outstanding equity securities of the Company (the “Outstanding
Company Stock”) or (B) the combined voting power of the then outstanding voting securities of the Company entitled to vote
generally in the election of directors (the “Outstanding Company Voting Securities) (the foregoing Beneficial Ownership
hereinafter being referred to as a “Controlling Interest”); provided, however, that for purposes of this Section 8(b),
the following acquisitions shall not constitute or result in a Change in Control: (v) any acquisition directly from the Company;
(w) any acquisition by the Company; (x) any acquisition by any Person that as of the Effective Date owns Beneficial Ownership
of a Controlling Interest; (y) any acquisition by any employee benefit plan (or related trust) sponsored or maintained by the
Company or any Related Entity; or (z) any acquisition by any entity pursuant to a transaction which complies with clauses (A),
(B) and (C) of subsection (iii) below; or

 

(ii) During
any period of two (2) consecutive years (not including any period prior to the Effective Date) individuals who constitute the
Board on the Effective Date (the “Incumbent Board”) cease for any reason to constitute at least a majority of the
Board; provided, however, that any individual becoming a director subsequent to the Effective Date whose election, or nomination
for election by the Company’s shareholders, was approved by a vote of at least a majority of the directors then comprising
the Incumbent Board shall be considered as though such individual were a member of the Incumbent Board, but excluding, for this
purpose, any such individual whose initial assumption of office occurs as a result of an actual or threatened election contest
with respect to the election or removal of directors or other actual or threatened solicitation of proxies or consents by or on
behalf of a Person other than the Board; or

 

(iii) Consummation
of a reorganization, merger, statutory share exchange or consolidation or similar transaction involving the Company or any of
its Related Entities, a sale or other disposition of all or substantially all of the assets of the Company, or the acquisition
of assets or equity of another entity by the Company or any of its Related Entities (each a “Business Combination”),
in each case, unless, following such Business Combination, (A) all or substantially all of the individuals and entities who were
the Beneficial Owners, respectively, of the Outstanding Company Stock and Outstanding Company Voting Securities immediately prior
to such Business Combination beneficially own, directly or indirectly, more than fifty percent (50%) of the value of the then
outstanding equity securities and the combined voting power of the then outstanding voting securities entitled to vote generally
in the election of members of the board of directors (or comparable governing body of an entity that does not have such a board),
as the case may be, of the entity resulting from such Business Combination (including, without limitation, an entity which as
a result of such transaction owns the Company or all or substantially all of the Company’s assets either directly or through
one or more subsidiaries) in substantially the same proportions as their ownership, immediately prior to such Business Combination
of the Outstanding Company Stock and Outstanding Company Voting Securities, as the case may be, (B) no Person (excluding
any employee benefit plan (or related trust) of the Company or such entity resulting from such Business Combination or any Person
that as of the Effective Date owns Beneficial Ownership of a Controlling Interest) beneficially owns, directly or indirectly,
fifty percent (50%) or more of the value of the then outstanding equity securities of the entity resulting from such Business
Combination or the combined voting power of the then outstanding voting securities of such entity except to the extent that such
ownership existed prior to the Business Combination and (C) at least a majority of the members of the Board of Directors or other
governing body of the entity resulting from such Business Combination were members of the Incumbent Board at the time of the execution
of the initial agreement, or of the action of the Board, providing for such Business Combination; or

 

    	 	17	 

     

    

 

(iv) Approval
by the shareholders of the Company of a complete liquidation or dissolution of the Company.

 

9. General
Provisions.

 

(a) Compliance
With Legal and Other Requirements. The Company may, to the extent deemed necessary or advisable by the Committee, postpone
the issuance or delivery of Shares or payment of other benefits under any Award until completion of such registration or qualification
of such Shares or other required action under any federal or state law, rule or regulation, listing or other required action with
respect to the Listing Market, or compliance with any other obligation of the Company, as the Committee, may consider appropriate,
and may require any Participant to make such representations, furnish such information and comply with or be subject to such other
conditions as it may consider appropriate in connection with the issuance or delivery of Shares or payment of other benefits in
compliance with applicable laws, rules, and regulations, listing requirements, or other obligations.

 

(b) Limits
on Transferability; Beneficiaries. No Award or other right or interest granted under the Plan shall be pledged, hypothecated
or otherwise encumbered or subject to any lien, obligation or liability of such Participant to any party, or assigned or transferred
by such Participant otherwise than by will or the laws of descent and distribution or to a Beneficiary upon the death of a Participant,
and such Awards or rights that may be exercisable shall be exercised during the lifetime of the Participant only by the Participant
or his or her guardian or legal representative, except that Awards and other rights (other than Incentive Stock Options and Stock
Appreciation Rights in tandem therewith) may be transferred to one or more Beneficiaries or other transferees during the lifetime
of the Participant, and may be exercised by such transferees in accordance with the terms of such Award, but only if and to the
extent such transfers are permitted by the Committee pursuant to the express terms of an Award Agreement (subject to any terms
and conditions which the Committee may impose thereon). A Beneficiary, transferee, or other person claiming any rights under the
Plan from or through any Participant shall be subject to all terms and conditions of the Plan and any Award Agreement applicable
to such Participant, except as otherwise determined by the Committee, and to any additional terms and conditions deemed necessary
or appropriate by the Committee.

 

    	 	18	 

     

    

 

(c) Adjustments.

 

(i) Adjustments
to Awards. In the event that any extraordinary dividend or other distribution (whether in the form of cash, Shares, or
other property), recapitalization, forward or reverse split, reorganization, merger, consolidation, spin-off, combination, repurchase,
share exchange, liquidation, dissolution or other similar corporate transaction or event affects the Shares and/or such other
securities of the Company or any other issuer, then the Committee shall, in such manner as it may deem equitable, substitute,
exchange or adjust any or all of (A) the number and kind of Shares which may be delivered in connection with Awards granted thereafter,
(B) the number and kind of Shares by which annual per-person Award limitations are measured under Section 4 hereof, (C) the number
and kind of Shares subject to or deliverable in respect of outstanding Awards, (D) the exercise price, grant price or purchase
price relating to any Award and/or make provision for payment of cash or other property in respect of any outstanding Award, and
(E) any other aspect of any Award that the Committee determines to be appropriate.

 

(ii) Adjustments
in Case of Certain Transactions. In the event of any merger, consolidation or other reorganization in which the Company
does not survive, or in the event of any Change in Control, any outstanding Awards may be dealt with in accordance with any of
the following approaches, without the requirement of obtaining any consent or agreement of a Participant as such, as determined
by the agreement effectuating the transaction or, if and to the extent not so determined, as determined by the Committee: (a)
the continuation of the outstanding Awards by the Company, if the Company is a surviving entity, (b) the assumption or substitution
for, as those terms are defined below, the outstanding Awards by the surviving entity or its parent or subsidiary, (c) full exercisability
or vesting and accelerated expiration of the outstanding Awards, or (d) settlement of the value of the outstanding Awards in cash
or cash equivalents or other property followed by cancellation of such Awards (which value, in the case of Options or Stock Appreciation
Rights, shall be measured by the amount, if any, by which the Fair Market Value of a Share exceeds the exercise or grant price
of the Option or Stock Appreciation Right as of the effective date of the transaction). For the purposes of this Agreement, an
Option, Stock Appreciation Right, Restricted Stock Award, Restricted Stock Unit Award or Other Stock-Based Award shall be considered
assumed or substituted for if following the Change in Control the Award confers the right to purchase or receive, for each Share
subject to the Option, Stock Appreciation Right, Restricted Stock Award, Restricted Stock Unit Award or Other Stock-Based Award
immediately prior to the Change in Control, on substantially the same vesting and other terms and conditions as were applicable
to the Award immediately prior to the Change in Control, the consideration (whether stock, cash or other securities or property)
received in the transaction constituting a Change in Control by holders of Shares for each Share held on the effective date of
such transaction (and if holders were offered a choice of consideration, the type of consideration chosen by the holders of a
majority of the outstanding shares); provided, however, that if such consideration received in the transaction constituting a
Change in Control is not solely common stock of the successor company or its parent or subsidiary, the Committee may, with the
consent of the successor company or its parent or subsidiary, provide that the consideration to be received upon the exercise
or vesting of an Option, Stock Appreciation Right, Restricted Stock Award, Restricted Stock Unit Award or Other Stock-Based Award,
for each Share subject thereto, will be solely common stock of the successor company or its parent or subsidiary substantially
equal in fair market value to the per share consideration received by holders of Shares in the transaction constituting a Change
in Control. The determination of such substantial equality of value of consideration shall be made by the Committee in its sole
discretion and its determination shall be conclusive and binding. The Committee shall give written notice of any proposed transaction
referred to in this Section 9(c)(ii) at a reasonable period of time prior to the closing date for such transaction (which notice
may be given either before or after the approval of such transaction), in order that Participants may have a reasonable period
of time prior to the closing date of such transaction within which to exercise any Awards that are then exercisable (including
any Awards that may become exercisable upon the closing date of such transaction). A Participant may condition his exercise of
any Awards upon the consummation of the transaction.

 

    	 	19	 

     

    

 

(iii) Other
Adjustments. The Committee is authorized to make adjustments in the terms and conditions of, and the criteria included
in, Awards (including Performance Awards, or performance goals and conditions relating thereto) in recognition of unusual or nonrecurring
events (including, without limitation, acquisitions and dispositions of businesses and assets) affecting the Company, any Related
Entity or any business unit, or the financial statements of the Company or any Related Entity, or in response to changes in applicable
laws, regulations, accounting principles, tax rates and regulations or business conditions or in view of the Committee’s
assessment of the business strategy of the Company, any Related Entity or business unit thereof, performance of comparable organizations,
economic and business conditions, personal performance of a Participant, and any other circumstances deemed relevant. Adjustments
permitted hereby may include, without limitation, increasing the exercise price of Options and Stock Appreciation Rights, increasing
performance goals, or other adjustments that may be adverse to the Participant.

 

(d) Taxes.
The Company and any Related Entity are authorized to withhold from any Award granted, any payment relating to an Award under the
Plan, including from a distribution of Shares, or any payroll or other payment to a Participant, amounts of withholding and other
taxes due or potentially payable in connection with any transaction involving an Award, and to take such other action as the Committee
may deem advisable to enable the Company or any Related Entity and Participants to satisfy obligations for the payment of withholding
taxes and other tax obligations relating to any Award. This authority shall include authority to withhold or receive Shares or
other property and to make cash payments in respect thereof in satisfaction of a Participant’s tax obligations, either on
a mandatory or elective basis in the discretion of the Committee.

 

(e) Changes
to the Plan and Awards. The Board may amend, alter, suspend, discontinue or terminate the Plan, or the Committee’s
authority to grant Awards under the Plan, without the consent of shareholders or Participants, except that any amendment or alteration
to the Plan shall be subject to the approval of the Company’s shareholders not later than the annual meeting next following
such Board action if such shareholder approval is required by any federal or state law or regulation (including, without limitation,
Rule 16b-3 or the rules of the Listing Market, and the Board may otherwise, in its discretion, determine to submit other such
changes to the Plan to shareholders for approval; provided that, except as otherwise permitted by the Plan or Award Agreement,
without the consent of an affected Participant, No such Board action may materially and adversely affect the rights of such
Participant under the terms of any previously granted and outstanding Award. The Committee may waive any conditions or rights
under, or amend, alter, suspend, discontinue or terminate any Award theretofore granted and any Award Agreement relating thereto,
except as otherwise provided in the Plan; provided that, except as otherwise permitted by the Plan or Award Agreement, without
the consent of an affected Participant, no such Committee or the Board action may materially and adversely affect the rights
of such Participant under terms of such Award.

 

    	 	20	 

     

    

 

(f) Limitation
on Rights Conferred Under Plan. Neither the Plan nor any action taken hereunder or under any Award shall be construed
as (i) giving any Eligible Person or Participant the right to continue as an Eligible Person or Participant or in the employ or
service of the Company or a Related Entity, (ii) interfering in any way with the right of the Company or a Related Entity to terminate
any Eligible Person’s or Participant’s Continuous Service at any time, (iii) giving an Eligible Person or Participant
any claim to be granted any Award under the Plan or to be treated uniformly with other Participants and Employees, or (iv) conferring
on a Participant any of the rights of a shareholder of the Company including, without limitation, any right to receive dividends
or distributions, any right to vote or act by written consent, any right to attend meetings of shareholders or any right to receive
any information concerning the Company’s business, financial condition, results of operation or prospects, unless and until
such time as the Participant is duly issued Shares on the stock books of the Company in accordance with the terms of an Award.
None of the Company, its officers or its directors shall have any fiduciary obligation to the Participant with respect to any
Awards unless and until the Participant is duly issued Shares pursuant to the Award on the stock books of the Company in accordance
with the terms of an Award. Neither the Company nor any of the Company’s officers, directors, representatives or agents
is granting any rights under the Plan to the Participant whatsoever, oral or written, express or implied, other than those rights
expressly set forth in this Plan or the Award Agreement.

 

(g) Unfunded
Status of Awards; Creation of Trusts. The Plan is intended to constitute an “unfunded” plan for incentive
and deferred compensation. With respect to any payments not yet made to a Participant or obligation to deliver Shares pursuant
to an Award, nothing contained in the Plan or any Award Agreement shall give any such Participant any rights that are greater
than those of a general creditor of the Company; provided that the Committee may authorize the creation of trusts and deposit
therein cash, Shares, other Awards or other property, or make other arrangements to meet the Company’s obligations under
the Plan. Such trusts or other arrangements shall be consistent with the “unfunded” status of the Plan unless the
Committee otherwise determines with the consent of each affected Participant. The trustee of such trusts may be authorized to
dispose of trust assets and reinvest the proceeds in alternative investments, subject to such terms and conditions as the Committee
may specify and in accordance with applicable law.

 

(h) Nonexclusivity
of the Plan. Neither the adoption of the Plan by the Board nor its submission to the shareholders of the Company for approval
shall be construed as creating any limitations on the power of the Board or a committee thereof to adopt such other incentive
arrangements as it may deem desirable.

 

    	 	21	 

     

    

 

(i) Payments
in the Event of Forfeitures; Fractional Shares. Unless otherwise determined by the Committee, in the event of a forfeiture
of an Award with respect to which a Participant paid cash or other consideration, the Participant shall be repaid the amount of
such cash or other consideration. No fractional Shares shall be issued or delivered pursuant to the Plan or any Award. The
Committee shall determine whether cash, other Awards or other property shall be issued or paid in lieu of such fractional shares
or whether such fractional shares or any rights thereto shall be forfeited or otherwise eliminated.

 

(j) Governing
Law. The validity, construction and effect of the Plan, any rules and regulations under the Plan, and any Award Agreement
shall be determined in accordance with the laws of the State of New York without giving effect to principles of conflict of laws,
and applicable federal law.

 

(k) Non-U.S.
Laws. The Committee shall have the authority to adopt such modifications, procedures, and subplans as may be necessary
or desirable to comply with provisions of the laws of foreign countries in which the Company or its Related Entities may operate
to assure the viability of the benefits from Awards granted to Participants performing services in such countries and to meet
the objectives of the Plan.

 

(l) Awards
Subject to Shareholder Approval; Termination of Plan. Awards may be granted subject to shareholder approval, but may not
be exercised or otherwise settled in the event the shareholder approval is not obtained. The Plan shall terminate at the earliest
of (a) such time as no Shares remain available for issuance under the Plan, (b) termination of this Plan by the Board, or (c)
the tenth anniversary of the Effective Date. Awards outstanding upon expiration of the Plan shall remain in effect until they
have been exercised or terminated, or have expired.

 

(m) Data
Protection. A Participant’s acceptance of an Award shall be deemed to constitute the Participant’s acknowledgement
of and consent to the collection and processing of personal data relating to the Participant so that the Company and its Subsidiaries
can fulfill their obligations and exercise their rights under the Plan and generally administer and manage the Plan. This data
shall include data about participation in the Plan and Shares offered or received, purchased or sold under the Plan from time
to time and other appropriate financial and other data (such as the date on which the Awards were granted) about the Participant
and the Participant’s participation in the Plan.

 

 

 

22Exhibit 10.24

 

THIS AMENDED AND RESTATED PROMISSORY NOTE
(“NOTE”) HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”).
THIS NOTE HAS BEEN ACQUIRED FOR INVESTMENT ONLY AND MAY NOT BE SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF REGISTRATION OF
THE RESALE THEREOF UNDER THE SECURITIES ACT OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY IN FORM, SCOPE AND SUBSTANCE TO THE
ISSUER THAT SUCH REGISTRATION IS NOT REQUIRED.

 

AMENDED AND RESTATED PROMISSORY NOTE

 

	Principal Amount: $371,178.00	Original Issuance Date: March 15, 2019
	 	
        Reissuance Date: September 8, 2020

        Effective Date: The date of the Consummation

        of the Business Combination (as defined)

 

This Amended and Restated
Promissory Note (this “Note”) amends and restates in its entirety that certain Promissory Note dated March 15,
2019 in the original principal amount of $1,087,031.00 that was issued by KBL Merger Corp. IV, a Delaware corporation (“Maker”),
to KBL IV Sponsor LLC (including its successors or assigns, “Payee”; and such original promissory note, the
“Original Note”). The Original Note is being amended and restated as set forth herein to, among other things,
reflect that the principal amount of the Original Note has been reduced from $1,087,031.00 to $371,178.

 

Effective the Effective
Date, Maker hereby promises to pay to the order of Payee the principal sum of Three Hundred Seventy-One Thousand One Hundred Seventy-Eight
Dollars ($371,178.00), in lawful money of the United States of America, on the terms and conditions described below.

 

1. Repayment. The
principal balance of this Note shall be due and payable upon the consummation of the purchase and sale of the Company’s Series
A Convertible Preferred Stock at the “Second Closing” contemplated under that certain Securities Purchase Agreement
(as amended or otherwise modified, the “Dominion Purchase Agreement”) dated as of June 12, 2020 among Maker,
the purchasers identified on the signature pages thereto, and Dominion Capital LLC as purchaser agent (such event, the “Preferred
Closing”), and the principal balance of this Note shall be paid out of the proceeds to Maker of the Preferred Closing
(with it being understood and agreed that this Note shall participate on a pro rata basis with any other payments scheduled to
be made out of the proceeds of the Preferred Closing) using the proceeds to Maker of the Preferred Closing. All payments on this
Note shall be made by check or wire transfer of immediately available funds or as otherwise agreed by Payee to such account as
Payee may from time to time designate by written notice in accordance with the provisions of this Note.

 

2. Interest. This
Note shall be non-interest bearing.

 

3. Application of
Payments. All payments rightfully received by Payee pursuant to this Note shall be applied first to the payment in full of
any costs incurred in the collection of any sum due under this Note, including without limitation reasonable attorneys’ fees,
then to the payment in full of any late charges and finally to the reduction of the unpaid principal balance of this Note.

 

4. Events of Default.
The following shall constitute an event of default (“Event of Default”):

 

(a) Failure to
Make Required Payments. Failure by Maker to pay the principal amount pursuant to this Note within five (5) business days following
the date when due.

 

(b) Voluntary Bankruptcy,
Etc. The commencement by Maker of a voluntary case under the Federal Bankruptcy Code, as now constituted or hereafter amended,
or any other applicable bankruptcy, insolvency, reorganization, rehabilitation or other similar law (“Bankruptcy Laws”),
or the consent by it to the appointment of or taking possession by a receiver, liquidator, assignee, trustee, custodian, sequestrator
(or other similar official) of Maker or for any substantial part of its property, or the making by it of any assignment for the
benefit of creditors, or the failure of Maker generally to pay its debts as such debts become due, or the taking of corporate action
by Maker in furtherance of any of the foregoing.

 

     

    	 

    

 

(c) Involuntary
Bankruptcy, Etc. The entry of a decree or order for relief by a court having jurisdiction in the premises in respect of Maker
in an involuntary case under any applicable Bankruptcy Laws, or appointing a receiver, liquidator, assignee, custodian, trustee,
sequestrator (or similar official) of Maker or for any substantial part of its property, or ordering the winding-up or liquidation
of its affairs, and the continuance of any such decree or order unstayed and in effect for a period of 60 consecutive days.

 

5. Remedies.
Subject to Section 15:

 

(a) Upon the occurrence
of an Event of Default specified in Section 4(a) hereof, Payee may, by written notice to Maker, declare this Note to be due immediately
and payable, whereupon the unpaid principal amount of this Note and all other amounts payable hereunder shall become immediately
due and payable without presentment, demand, protest or other notice of any kind, all of which are hereby expressly waived, anything
contained herein or in the documents evidencing the same to the contrary notwithstanding.

 

(b) Upon the occurrence
of an Event of Default specified in Sections 4(b) and 4(c) hereof, the unpaid principal balance of this Note and all other amounts
payable hereunder shall automatically and immediately become due and payable, in all cases without any action on the part of Payee.

 

(c) In the event that
Maker does not make the payments to Payee as (and in the amounts) required under Section 1 as a result of the Preferred Closing,
or (and assuming that Maker has made the payments to Payee as (and in the amounts) required under Section 1 as a result of the
Preferred Closing) if Maker does not repay the unpaid principal balance of this Note in full to Payee on or prior to the second
business day following the consummation of a capital raising transaction following the closing of Maker’s initial business
combination (as described in the prospectus contained in Maker’s registration statement on Form S-1 filed with the Securities
and Exchange Commission in connection with Maker’s initial public offering) yielding aggregate gross proceeds to Maker in
an amount equal to or in excess of $5,000,000, then Maker shall pay to Payee as partial liquidated damages and not as a penalty
an additional amount equal to $2,000 per day for each additional day until this Note is paid in full; provided, that the
maximum liquidated damages shall be the principal balance of this Note that remains unpaid upon the occurrence of the first applicable
repayment event described in this Section 5(c)).

 

6. Waivers. Maker
and all endorsers and guarantors of, and sureties for, this Note waive presentment for payment, demand, notice of dishonor, protest,
and notice of protest with regard to this Note, all errors, defects and imperfections in any proceedings instituted by Payee under
the terms of this Note, and all benefits that might accrue to Maker by virtue of any present or future laws exempting any property,
real or personal, or any part of the proceeds arising from any sale of any such property, from attachment, levy or sale under execution,
or providing for any stay of execution, exemption from civil process, or extension of time for payment; and Maker agrees that any
real or personal property that may be levied upon pursuant to a judgment obtained by virtue hereof, on any writ of execution issued
hereon, may be sold upon any such writ in whole or in part in any order desired by Payee.

 

7. Unconditional
Liability. Maker hereby waives all notices in connection with the delivery, acceptance, performance, default, or enforcement
of the payment of this Note, and agrees that its liability shall be unconditional, without regard to the liability of any other
party, and shall not be affected in any manner by any indulgence, extension of time, renewal, waiver or modification granted or
consented to by Payee, and consents to any and all extensions of time, renewals, waivers, or modifications that may be granted
by Payee with respect to the payment or other provisions of this Note, and agrees that additional makers, endorsers, guarantors,
or sureties may become parties hereto without notice to Maker or affecting Maker’s liability hereunder.

 

8. Notices. Any
notice called for hereunder shall be deemed properly given if (i) sent by certified mail, return receipt requested, (ii) personally
delivered, (iii) dispatched by any form of private or governmental express mail or delivery service providing receipted delivery,
(iv) sent by facsimile or (v) sent by e-mail, to the following addresses or to such other address as either party may designate
by notice in accordance with this Section:

 

    2

    	 

    

 

	 	 	 
	If to Maker, to:	 	with a copy (which will not constitute notice) to:
	KBL Merger Corp. IV	 	Pryor Cashman LLP
	30 Park Place, Suite 45E	 	7 Times Square
	New York, NY 10007	 	New York, New York 10036
	Attn: Marlene Krauss M.D., CEO	 	Attn: 	M. Ali Panjwani, Esq.
	 	 	 	 
	Email: mkrauss@kblvc.com	 	Telephone No.: (212) 326-4100
	 	 	Email: 	 ali.panjwani@pryorcashman.com
	 	 	 

 

	If to Payee, to:	 	with a copy (which will not constitute notice) to:
	 	 	 
	KBL Sponsor IV LLC	 	Pryor Cashman LLP
	30 Park Place, Suite 45E	 	7 Times Square
	New York, NY 10007	 	New York, New York 10036
	Attn: Marlene Krauss M.D., Managing Member	 	Attn: 	M. Ali Panjwani, Esq.
	 	 	 	 
	Email: mkrauss@kblvc.com	 	Telephone No.: (212) 326-4100
	 	 	Email: 	 ali.panjwani@pryorcashman.com
	 	 	 

 

Notice shall be deemed given on the earlier
of (i) actual receipt by the receiving party, (ii) the date shown on a facsimile transmission confirmation, (iii) the date on which
an e-mail transmission was received by the receiving party’s on-line access provider (iv) the date reflected on a signed
delivery receipt, or (vi) two (2) business days following tender of delivery or dispatch by express mail or delivery service.

 

9. Governing
Law; Venue, Jury Trial Waiver. This Note shall be construed and enforced in accordance with the laws of the State of New York,
without regard to the conflict of laws provisions thereof. Any legal suit, action or proceeding arising out of or relating to this
Note shall be instituted exclusively in the state or federal courts of the State of New York (and any appellate courts thereof).
EACH PARTY HERETO HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATED
TO THIS NOTE OR ANY OBLIGATIONS HEREUNDER.

 

10.
Severability. Any provision contained in this Note which is prohibited or unenforceable in any jurisdiction shall, as to such
jurisdiction, be ineffective to the extent of such prohibition or unenforceability without invalidating the remaining provisions
hereof, and any such prohibition or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision
in any other jurisdiction.

 

11.
Trust Waiver. Notwithstanding anything herein to the contrary, Payee hereby waives any and all right, title, interest or claim
of any kind (a “Claim”) in or to any distribution of or from the trust account (the “Trust Account”)
established by Maker in which the proceeds of the IPO (including without limitation overallotment securities sold by Maker’s
underwriter) and the proceeds of the sale of the units issued in the private placement that occurred in connection with the IPO,
as described in greater detail in the registration statement and prospectus filed in connection with the IPO, were deposited, and
hereby agrees not to seek recourse, reimbursement, payment or satisfaction for any Claim against the Trust Account or distributions
therefrom to Maker’s public stockholders for any reason whatsoever; provided, however, that upon the consummation of the
Business Combination, Maker shall repay the principal balance of this Note out of the proceeds released to Maker from the Trust
Account.

 

12.
Entire Agreement; Amendment; Waiver. This Note constitutes the entire agreement between the parties with respect to the subject
matter hereof and referenced herein, and supersedes and terminates any prior agreements between the parties (written or oral) with
respect to the subject matter hereof, including, without limitation, the Original Note. Any amendment or modification to, or waiver
of any provision of, this Note may be made with, and only with, the written consent of Maker and Payee.

 

    3

    	 

    

 

13.
Assignment. No assignment or transfer of this Note or any rights or obligations hereunder may be made by any party hereto (by
operation of law or otherwise) without the prior written consent of the other party hereto and any attempted assignment without
the required consent shall be void; provided, however, that the foregoing shall not apply to an affiliate of Payee who agrees
to be bound to the terms of this Note.

 

14.
Miscellaneous. Each right, power and remedy of Payee provided for in this Note or now or hereafter existing at law or in equity
or by statute or otherwise shall be cumulative and concurrent and shall be in addition to every other such right, power or remedy.
This Note may be executed in multiple counterparts, including without limitation by facsimile, pdf or other electronic document
transmission, each of which shall be deemed an original and all of which together shall constitute one and the same instrument.
When a reference is made in this Note to a Section, such reference shall be to a Section of or to this Note unless otherwise indicated.
Unless the context requires otherwise, the terms “hereof,” “herein,” “hereby,” “hereto”
and derivative or similar words in this Note refer to this entire Note. Unless the context requires otherwise, words in this Note
using the singular or plural number also include the plural or singular number, respectively, and the use of any gender herein
shall be deemed to include the other genders. References in this Note to “dollars”, “Dollars” or “$”
are to U.S. dollars. This Note was prepared jointly by the parties and no rule that it be construed against the drafter will have
any application in its construction or interpretation. For purposes of this Note, the term “business day” shall mean
any day that is not a Saturday, Sunday or any other day on which banks are required or authorized by law to be closed in New York,
New York.

 

15. Subordination.
Reference is made to the Dominion Purchase Agreement and the Transaction Documents (as such term is defined in the Dominion Purchase
Agreement) executed and delivered in connection therewith. Upon the occurrence and continuance of an Event of Default (as such
term is defined in the applicable Transaction Document), and until Maker’s obligations to the secured parties under the Transaction
Documents have been satisfied in full, Maker’s obligations under this Note shall be second and subordinate to the rights
of such secured parties; provided, that the foregoing shall not in any way limit the obligation of Maker to repay this Note
in full, and to make the payments due hereunder to Payee in the absence of an Event of Default under the Transaction Documents.

 

[Signature Page Follows]

 

    4

    	 

    

 

IN WITNESS WHEREOF,
Maker, intending to be legally bound hereby, has caused this Amended and Restated Promissory Note to be duly executed by the
undersigned as of this 8th day of September, 2020.

 

	 	KBL MERGER CORP. IV
	 	 
	 	By:	/s/ Marlene Krauss, M.D.
	 	Name: 	Marlene Krauss, M.D.
	 	Title:	Chief Executive Officer

 

Acknowledged and agreed, effective as of the date first
set forth above:

 

	
        

        KBL SPONSOR IV LLC
	 
	 	 
	By:	/s/ Marlene Krauss, M.D.	 
	Name: 	Marlene Krauss, M.D.	 
	Title:	Managing Member	 

 

 

5

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