Document:

Exhibit 4.3

 

 

Robert J. (Don) MacDonald

1788 Acadia Road

Vancouver,

British Columbia

V6T 1R3

 

DATE: May 4, 2018

 

Private & Confidential

 

Offer of Employment – President
& Chief Executive Officer

 

Dear Mr. MacDonald,

 

We are pleased to confirm our offer of
employment in the position of President and Chief Executive Officer of Canadian Zinc Corporation, on the terms and conditions which
are set out below which would govern your employment with the Company.

 

Commencement

 

You will be expected to take
up employment on a full-time basis as soon as reasonably practical, tentatively on May 16, 2018, and, in any event, by no later
than the date of the Company’s forthcoming Annual Meeting which is expected to be held on June 27, 2018.

 

Duties and Responsibilities

 

In the position of Chief Executive
Officer, you will report directly to the Company’s Board of Directors and will be responsible for performing the services, duties
and functions normally within the scope of such role, along with such other duties as may be reasonably assigned to you, from time
to time, by the Company’s Board of Directors.

 

You will be required to devote
substantially all of your working time, energies and skills to the business of the Company and you will, at all times, be both
expected and required to comply with the policies established and maintained by the Company, from time to time, during the course
of your employment.

 

You acknowledge that the nature
of these duties may be subject to change from time to time in response to legitimate business requirements of the Company.

 

Location and Principal
Place of Employment

 

Your principal place of employment
will be in Vancouver, British Columbia, and you acknowledge that your responsibilities will involve an amount of travel to execute
your duties.

 

Suite
1710-650 West Georgia Street

Vancouver,
BC V6B 4N9

Tel:
(604) 688-2001 Fax: (604) 688-2043

Website:
www.canadianzinc.com

 

     

     

    

 

Page 2

 

Compensation 

 

You will be paid a base annual
salary of Three Hundred and Sixty Thousand Canadian Dollars (Cdn$360,000), payable in equal bi-monthly instalments of $15,000 (fifteen
thousand dollars), subject to all applicable statutory deductions.

 

Your salary will be reviewed
annually, with the first review coinciding with the review of other senior employees in early 2019, taking into consideration your
performance and the financial position of the Company, including the ability of the Company to raise the financing it requires
to implement its business plans, both as assessed in the sole discretion of the Company’s Board of Directors

 

The Company does not currently
provide any pension or retirement savings plans or programs.

 

Equity Incentives

 

In addition to any other compensation
or benefits provided herein, you may, subject to the financial position of the Company, become eligible for an incentive bonus
upon achieving certain targets or objectives to be agreed from time to time by the Board of Directors. The amount of the any incentive
bonus payable shall be at the sole discretion of the Board of Directors.

 

You shall be entitled to participate
in all incentive plans which the Company may from time to time provide to its senior executives, including the award of restricted
share units under the Company’s Restricted Share Unit (RSU) Plan, and the grant of incentive stock options under the Company’s
Stock Option Plan, as and when approved by the Board of Directors in its sole discretion, and subject to the terms and conditions
contained in such plans and the associated standard form agreements, copies of which will be provided to you.

 

The award of equity incentives
under the Company’s Restricted Share Unit Plan will have two parts, one providing potential short-term incentive bonus and
the other providing potential longer-term incentives.

 

It is expected that in each
calendar year following December 31, 2018 an award of up to the equivalent value of 30% of base annual salary (pro-rated for any
partial year of service) may be awarded as a short-term equity incentive bonus (being the award of RSUs, valued as at the date
of grant, with immediate vesting and a pay-out of one year from the date of grant) and an award of up to the equivalent value of
100% of base annual salary (pro-rated for any partial year of service) may be awarded as a long-term equity incentive (being the
award of RSUs valued as at the date of grant, with deferred vesting two years from the date of grant and pay-out three years from
the date of grant), subject to standard conditions.

 

These targets will be subject
to annual review taking into consideration your performance and the performance of the business, as well as any changes to the
Company’s compensation policies.

 

For the avoidance of doubt,
please note that any unvested long-term incentive awards will require your continued employment as a condition to vesting.

 

Suite
1710-650 West Georgia Street, Vancouver, BC V6B 4N9

Tel:
(604) 688-2001 Fax: (604) 688-2043

Website:
www.canadianzinc.com

 

     

     

    

 

Page 3

 

Upon commencing employment,
you will be granted equity incentive stock options under the Company’s Stock Option Plan on 2,500,000 (two million, five
hundred thousand) shares, exercisable at $0.20 per share, with vesting of such options quarterly in arrears over a period of two
years (eight quarters), and with a term of five years from date of grant, subject to the terms and conditions of the Stock Option
Plan and to the increase in the number of options available under the Stock Option Plan.

 

Medical Insurance

 

Effective as of your commencement
date, and subject to your eligibility and any prescribed waiting period, you shall become eligible to participate in the Company’s
group life, long-term disability, extended medical and dental insurance coverage, in accordance with the plans, policies and procedures
of the Company in effect from time to time and, to the extent permissible by law, the Company shall extend medical and dental insurance
coverage to your spouse and your dependent children. Further details regarding the Company’s current group benefits will
be provided to you.

 

Your participation in these
benefit plans will be subject to the terms and eligibility criteria provided for in the applicable insurance policies, as those
policies may be amended from time to time. The Company reserves the right to alter, amend, replace or discontinue the benefit plans
it makes available to its employees at any time, with or without notice.

 

Business Expenses

 

The Company shall reimburse
you for all reasonable and documented expenses incurred by you in the performance of your duties and responsibilities in accordance
with the Company’s policies and procedures, upon submission and approval of written expense accounts.

 

Annual Vacation and Holidays

 

You shall be entitled to five
(5) weeks of paid vacation during each fiscal year of the Company, pro-rated for any partial years of service. In the event you
do not take all the vacation to which you are entitled in any fiscal year, you shall be entitled to take up to two weeks of such
vacation in the next following fiscal year, but you shall not be permitted to carry over more than two weeks’ vacation in any fiscal
year.

 

It is understood by the Company
that certain commitments have been made for personal family travel during June and part of July 2018 and these travel plans will
be accommodated by the Company.

 

In addition, you shall be entitled
to all federal statutory and provincial holidays and any other paid holidays provided under the policies and procedures of the
Company in effect from time to time.

 

Termination of the Employment
Relationship 

 

		a.	Termination by the Company 

 

Your employment with the
Company may be terminated by the Company at any time, without cause, upon the Company providing you with notice of
termination, or pay in lieu of notice (which shall be calculated based exclusively on the base salary you are earning at the
time), or some combination of the two, equal to: (i) nine (9) months’ notice during your first full year of employment; (ii)
twelve (12) months’ notice during the second full year of employment, and (iii) twenty-four (24) months’ notice
at any time after two full years of employment (the “Notice Period”). Payments will be processed in equal
installments, via payroll, over the applicable Notice Period.

 

Suite
1710-650 West Georgia Street, Vancouver, BC V6B 4N9

Tel:
(604) 688-2001 Fax: (604) 688-2043

Website:
www.canadianzinc.com

 

     

     

    

 

Page 4

 

In the event of termination
by the Company, without cause, the Company would continue to pay the premiums required to maintain your participation in the extended
health (excluding health spending account) and dental group benefit plans then being made generally available to active executive
level employees until the earlier of the end of the applicable Notice Period or the date on which you become eligible to participate
in similar benefits through alternate or self-employment.

 

All other benefits would be
discontinued at the end the applicable statutory notice period and any unvested long-term incentive awards or options will be cancelled
as of the date of termination.

 

Notwithstanding the above, the
Company reserves the right to terminate your employment for cause, at any time, without notice or pay in lieu of notice
and any unvested long-term incentive awards or options will be cancelled.

 

		b.	Resignation 

 

Should you decide to end your
employment relationship with the Company, you will be required to provide the Company with four (4) weeks’ written notice of your
intention to resign, which notice may be waived in whole or in part by the Company in its sole and absolute discretion, and any
unvested long-term incentive awards will be cancelled.

 

		c.	Resignation for Good Reason 

 

If there is a material change
in your authorities, duties or responsibilities, you will have the right to provide the Company with written notice of your intention
to resign for Good Reason during the thirty-day period following said change. Upon receipt of this notice, the Company will
have a period of thirty (30) days to address or rectify the alleged deficiencies. A resignation for Good Reason would entitle you
to the same payments and other benefits that would result from your being terminated by the Company at that time, for reasons other
than cause, pursuant to the terms of this Agreement.

 

		d.	Change of control

 

In the event of a Change of
Control. as defined in this Agreement, that is not a Permitted Transaction, and subsequent termination by the Company without cause,
or your resignation within three (3) months of the Change of Control, you would be entitled to receive an amount equal to twenty-four
months of your then current annual base salary.

 

The Company would continue to
pay the premiums required to maintain your participation in the extended health (excluding health spending account) and dental
group benefit plans then being made generally available to active executive level employees for the earlier of the end of twenty-four
months or until the date on which you become eligible to participate in similar benefits through alternate or self-employment.

 

Suite
1710-650 West Georgia Street, Vancouver, BC V6B 4N9

Tel:
(604) 688-2001 Fax: (604) 688-2043

Website:
www.canadianzinc.com

 

     

     

    

 

Page 5

 

For the purposes of
this Agreement:

 

(a) a “Change in Control”
of the Employer shall have occurred when:

 

(i) any person or combination
of persons acting jointly or in concert acquires or becomes the beneficial owner of, directly or indirectly, more than 50% of the
voting securities of the Company, through the acquisition of previously issued and outstanding voting securities, or any other
transaction having a similar effect; or

 

(ii) the sale or transfer of
the majority of the operating assets of the Employer to an entity not controlled by the Company (the “New Company”) and
you are not offered employment with the New Company on substantially the same terms as the terms of your employment with the Company.

 

(b) a “Permitted Transaction”
shall mean any merger, amalgamation, reverse takeover, plan of arrangement or like transaction initiated by the Employer pursuant
to an ordinary resolution by the Board of Directors which would otherwise constitute a Change of Control hereunder.

 

e. No
Other Termination/Severance Entitlements Shall Apply 

 

The termination and severance
arrangements provided for in this Agreement represent the Company’s maximum termination and severance obligations to you. No other
notice or severance entitlements shall apply. It is agreed that the above compensation is inclusive of, and not in addition to,
any entitlements owed pursuant to any applicable Employment Standards Act or similar legislation (the “ESA”).
You agree to waive any right to further or additional compensation of any kind, whether pursuant to contract, the common law or
otherwise. ln the unlikely event your entitlements pursuant to the ESA were ever to exceed the entitlements provided for in this
Agreement, the entitlements provided for under the ESA shall supersede and replace the entitlements provided for in this Agreement.

 

To avoid any potential for confusion,
under no circumstances will any bonus or incentive entitlements be paid or awarded to you in respect of any period of non-working
notice of termination or any period for which pay in lieu of notice, termination pay, severance pay or any other monies in relation
to the cessation of employment are paid or otherwise required by applicable law, regardless of whether the termination is with
or without cause or with or without notice.

 

The termination of employment
related provisions contained in this Agreement shall remain in full force and effect un-amended, notwithstanding any other alterations
to the terms and conditions of your employment, unless agreed to by the Company in writing.

 

Protection of Confidential
Information

 

Any knowledge or information
concerning the Company acquired during the course of, or in connection with your employment, either directly or indirectly, should
be regarded as being of a confidential nature and must not be divulged to any third party without the written consent of the Company.
All business or proprietary information, including financial and commercial information, concerning the Company (“Confidential
Information”) is the property of the Company or parties who are business associates of the Company, as the case may be, and
is strictly confidential to the Company and/or such parties. You shall not make any unauthorized disclosure or use, and you shall
use your best efforts to prevent unauthorized disclosure or use, of such Confidential Information and you shall safeguard all Confidential
Information at all times, and exercise at least the same degree of care used to protect your own confidential information, so that
Confidential Information is not disclosed to or used by unauthorized persons.

 

Suite
1710-650 West Georgia Street, Vancouver, BC V6B 4N9

Tel:
(604) 688-2001 Fax: (604) 688-2043

Website:
www.canadianzinc.com

 

     

     

    

 

Page 6

 

Delivery of Records upon
Termination

 

Upon the termination of your
employment you will hand over and deliver to the Company in good order, all books, records, documents, accounts, or other property
or assets belonging to the Company or developed in connection with the business of the Company.

 

Non-Competition and Restrictive Covenant

 

During the term of your employment
and for twelve (12) months following the termination of your employment, you shall not, directly or indirectly, in any manner whatsoever,
including without limitation either individually or in partnership or jointly, or in conjunction with any other person or persons,
company or corporation, as principal, agent, shareholder, employee or in any other manner whatsoever, carry on or be engaged in
or be concerned with or interested in any mining property that is owned either in whole or in part by the Company or in which the
Company has an interest or any mining or mineral property that is located within one hundred (100) kilometres of such other property.

 

Inside Information

 

You acknowledge that applicable
Canadian securities legislation prohibit persons who have knowledge of a material fact or material change (as that term is defined
in the Securities Laws) about the Company that has not been generally disclosed, from purchasing or selling securities of the Company
and from informing any other person of such material fact or material change.

 

Entire Agreement and Governing Law

 

This Agreement supersedes any
prior understandings or agreements that may have existed between you and the Company. You acknowledge that you are not relying
on any oral or written representations or collateral agreements in entering into this Agreement with the Company.

 

The terms and conditions relating
to your employment will be governed and construed in accordance with laws of the Province of British Columbia.

 

General Provisions

 

This offer of employment is
conditional on the successful negotiation by the Company and approval by the Board of Directors of an equity financing with RCF
in the minimum amount of $20 million, including the restructuring of the Company’s current Bridge Loan with RCF.

 

In the event that such financing
and restructuring is successfully negotiated and approved by the Board of Directors, and you commence employment prior to the Annual
Meeting of Shareholders on June 27, 2018, you will be initially appointed to hold the position of President of the Company, at
the remuneration set out in this Agreement, on the understanding that you will be appointed as President and Chief Executive following
the Annual Meeting of Shareholders.

 

Suite
1710-650 West Georgia Street, Vancouver, BC V6B 4N9

Tel:
(604) 688-2001 Fax: (604) 688-2043

Website:
www.canadianzinc.com

 

     

     

    

 

Page 7

 

Please confirm your acceptance of this
offer and the above terms and conditions by signing and returning a copy of this letter no later than May 11, 2018.

 

We look forward to working with you and
your contribution to the future success of this Company.

 

On behalf of the Board of Directors,

 

Your truly

 

	CANADIAN ZINC CORPORATION	 
	 	 
	“John F. Kearney”	 
	John F. Kearney	 
	Chairman and Chief Executive	 

 

Suite
                                         1710-650 West Georgia Street, Vancouver, BC V6B 4N9

Tel:
(604) 688-2001 Fax: (604) 688-2043

Website:
www.canadianzinc.com

 

     

     

    

 

Page
8

 

ACCEPTANCE OF OFFER OF EMPLOYMENT

 

I have received a copy of this letter.
I have read, considered, understood and hereby accept the Company’s offer of employment, on and subject to the terms and
conditions contained in this letter. I acknowledge that I have been given an opportunity to seek independent legal advice with
respect to this Agreement. I understand that in the event of the termination of my employment, my entitlements will be limited
to those specified in this Agreement. I am executing this Agreement freely and voluntarily with a full understanding of its contents.

 

	Signature:	 	 	Date:	 
	 	 	 	 	 
	Witness:	 	 	Date:	 

 

Suite
1710-650 West Georgia Street, Vancouver, BC V6B 4N9

Tel:
(604) 688-2001 Fax: (604) 688-2043

Website:
www.canadianzinc.comExhibit 4.4

 

NORZINC LTD. 

 

STOCK OPTION PLAN

(as implemented as a result of a Plan of Arrangement September 6, 2018)

ARTICLE ONE

 

DEFINITIONS AND INTERPRETATIONS

 

Section 1.01         Definitions:
For purposes of the Plan, unless such word or term is otherwise defined herein or the context in which such word or term is used
herein otherwise requires, the following words and terms with the initial letter or letters thereof capitalized shall have the
following meanings:

 

(a)          “Change
of Control” means the acquisition by any person or by any person and all Joint Actors, whether directly or indirectly,
of voting securities (as defined in the Securities Act) of the Corporation, which, when added to all other voting securities of
the Corporation at the time held by such person or by such person and all Joint Actors, totals for the first time not less than
fifty percent (50%) of the outstanding voting securities of the Corporation or the votes attached to those securities are sufficient,
if exercised, to elect a majority of the Board of Directors of the Corporation;

 

(b)          “Committee”
shall mean the Directors or, if the Directors so determine in accordance with section 2.03 of the Plan, the committee of the Directors
authorized to administer the Plan;

 

(c)          “Common
Shares” shall mean the common shares of the Corporation, as adjusted in accordance with the provisions of Article Six
of the Plan;

 

(d)          “Corporation”
shall mean NorZinc Ltd., a corporation existing pursuant to the provisions of the Business Corporations Act (British Columbia);

 

(e)          “Directors”
shall mean the directors of the Corporation from time to time;

 

(f)          “Eligible
Insiders” shall mean the Insiders of the Corporation or of any subsidiary of the Corporation from time to time who, by
the nature of their positions are, in the opinion of the Committee, in a position to contribute to the success of the Corporation;

 

(g)          “Eligible
Employees” shall mean employees, including officers, whether Directors or not, and including both full-time and part-time
employees, of the Corporation or any subsidiary of the Corporation who, by the nature of their positions or jobs are, in the opinion
of the Committee, in a position to contribute to the success of the Corporation;

 

(h)          “Expiry
Date” means the later of: (i) the date specified by the Committee at the time of the grant of the Option as the date on
which it expires; and (ii) if the date referred to in the foregoing subpart (i) occurs during, or within five (5) trading days
after the end of, a trading black-out period imposed by the Corporation (a “black out period”), the Expiry Date
shall be the date that is ten (10) trading days following the date on which such black out period ends or, if an additional black-out
period is subsequently imposed by the Corporation during the such ten trading day period, then the Expiry Date shall be the date
thereafter that is the tenth consecutive trading day during which no management imposed black out is in place;

 

     

     

    

 

(i)          “Expiry
Time” has the meaning given to that term in Section 4.04;

 

(j)          “Insider”
means an insider as defined in the policies of the TSX;

 

(k)          “Joint
Actor” means a person acting “jointly or in concert with” another person as that phrase is interpreted in Multilateral
Instrument 62-104 Take-Over Bids and Issuer Bids;

 

(l)          “Option”
shall mean an option to purchase Common Shares granted pursuant to, or governed by, the Plan;

 

(m)         “Option
Agreement” means an agreement, substantially in the form attached hereto as Schedule “A”, with such additions
there to or modifications thereof as may be approved by the Corporation prior to or at the time an Option is granted, whereby the
Corporation grants to an Optionee an Option;

 

(n)          “Optionee”
means a Participant to whom an Option has been granted pursuant to the Plan;

 

(o)          “Option
Period” for a particular Option shall mean the period of time commencing on the date of grant of such Option and ending
at the Expiry Time;

 

(p)          “Option
Shares” means the aggregate number of Common Shares which an Optionee may purchase under an Option;

 

(q)          “Participant”
means a person eligible to be issued Options under the Plan by virtue of being either an Eligible Insider, Eligible Employee or
Service Provider;

 

(r)          “Plan”
shall mean this stock option plan;

 

(s)          “Securities
Act” means the Securities Act (British Columbia), as may be amended from time to time;

 

(t)          “Service
Provider” shall mean any person or corporation, other than an Eligible Employee or Eligible Insider, engaged to provide
services for the Corporation or for any entity controlled by the Corporation for an initial, renewable or extended period of twelve
months or more (or such lesser period of time as may be approved by the Committee and acceptable to TSX on a case by case basis),
and shall also include any individuals employed by such person or corporation;

 

(u)          “TSX”
shall mean The Toronto Stock Exchange;

 

(v)         “Unissued
Option Shares” means the number of Common Shares, at a particular time, which have been reserved for issuance upon the
exercise of an Option but which have not been issued, as adjusted from time to time in accordance with the provisions of Article
6, such adjustments to be cumulative; and

 

(w)          “Vested”
means that an Option has become exercisable in respect of Options held by an Optionee.

 

Section 1.02         Securities
Definitions: In the Plan, the terms “associate”, “subsidiary” and “insider” shall have the meanings
given to such terms in the Securities Act.

 

    	 	- 2 -	 

     

    

 

Section 1.03         Headings:
The headings of all articles, sections, and paragraphs in the Plan are inserted for convenience of reference only and shall not
affect the construction or interpretation of the Plan.

 

Section 1.04         Context,
Construction: Whenever the singular or masculine are used in the Plan, the same shall be construed as being the plural or feminine
or neuter or vice versa where the context so requires.

 

Section 1.05         References
to the Plan: The words “herein”, “hereby”, “hereunder”, “hereof” and similar expressions
mean or refer to the Plan as a whole and not to any particular article, section, paragraph or other part hereof.

 

Section 1.06         Canadian
Funds: Unless otherwise specifically provided, all references to dollar amounts in the Plan are references to lawful money
of Canada.

 

ARTICLE TWO

 

PURPOSE AND ADMINISTRATION OF THE PLAN

 

Section 2.01         Purpose
of the Plan: The Plan provides for the grant of Options to Participants for the purpose of advancing the interests of the Corporation
through the motivation, attraction and retention of directors, officers, employees and service providers of the Corporation and
subsidiaries of the Corporation and to secure for the Corporation and the shareholders of the Corporation the benefits inherent
in the ownership of Common Shares by directors, officers, employees and service providers of the Corporation and subsidiaries of
the Corporation, it being generally recognized that stock option plans aid in attracting, retaining and encouraging directors,
officers, employees and service providers due to the opportunity offered to them to acquire a proprietary interest in the Corporation.

 

The Plan is designed to comply with the
policies set forth in the TSX Company Manual and, subject to Section 8.01, is to be implemented and effective upon approval of
the Plan by the shareholders of the Corporation.

 

Section 2.02         Administration
of the Plan: The Plan shall be administered by the Committee and the Committee shall have full authority to administer the
Plan including the authority to interpret and construe any provision of the Plan and to adopt, amend and rescind such rules and
regulations for administering the Plan as the Committee may deem necessary in order to comply with the requirements of the Plan.
All actions taken and all interpretations and determinations made by the Committee in good faith shall be final and conclusive
and shall be binding on the Participants and the Corporation. No member of the Committee shall be personally liable for any action
taken or determination or interpretation made in good faith in connection with the Plan and all members of the Committee shall,
in addition to their rights as Directors, be fully protected, indemnified and held harmless by the Corporation with respect to
any such action taken or determination or interpretation made. The appropriate officers of the Corporation are hereby authorized
and empowered to do all things and execute and deliver all instruments, undertakings and applications and writings as they, in
their absolute discretion, consider necessary for the implementation of the Plan and of the rules and regulations established for
administering the Plan. All costs incurred in connection with the Plan shall be for the account of the Corporation.

 

Section 2.03         Delegation
to Committee: All of the powers exercisable hereunder by the Directors may, to the extent permitted by applicable law and as
determined by resolution of the Directors, be exercised by a committee of the Directors comprised of not less than three Directors.

 

    	 	- 3 -	 

     

    

 

Section 2.04         Record
Keeping: The Corporation shall maintain a register in which shall be recorded:

 

(a)          the
name and address of each Optionee;

 

(b)          the
number of Common Shares subject to Options granted to each Optionee; and

 

(c)          the
aggregate number of Common Shares subject to Options.

 

Section 2.05         Previously
Granted Options: As set forth in Sections 2.01 and 8.01, the Plan is to be implemented and effective upon approval of the Plan
by the shareholders of the Corporation (with the date of such approval to be hereinafter referred to as the “Effective
Date”). In the event that on the Effective Date there are outstanding stock options (the “Pre-Existing Options”)
that were previously granted by the Corporation pursuant to any stock option plan (a “Pre-Existing Plan”) in place
prior to the Effective Date, all such Pre-Existing Options shall continue to be governed by and subject to the terms of the Pre-Existing
Plan.

 

Section 2.06         Amendments
Apply to Granted Options: Any amendments made to the terms of the Plan after the date hereof that are of general application
shall apply to all Options governed by the Plan, whether granted before or after the date of the amendment or made subject to the
Plan by operation of Section 2.05 above.

 

ARTICLE THREE

 

ELIGIBILITY AND PARTICIPATION

IN THE PLAN AND GRANT OF OPTIONS

 

Section 3.01         Eligibility:
Options shall only be granted to Participants.

 

Section 3.02         Determination
of Option Recipients and Option Terms: The Committee shall from time to time determine the Participants to whom Options shall
be granted, the number of Common Shares to be made subject to and the date of expiry of each Option granted to each Participant
and the other terms of each Option granted to each Participant including any vesting provisions that may be applicable, all such
determinations to be made in accordance with the terms and conditions of the Plan, and the Committee may take into consideration
the present and potential contributions of and the services rendered by the particular Participant to the success of the Corporation
and any other factors which the Committee deems appropriate and relevant. Each Option granted to a Participant shall be evidenced
by an Option Agreement containing terms and conditions consistent with the provisions of the Plan, which terms and conditions need
not be the same in each case.

 

ARTICLE FOUR

 

NUMBER OF COMMON SHARES SUBJECT TO THE

PLAN, EXERCISE PRICE AND TERM OF OPTIONS

 

Section 4.01         Number
of Shares: As of the Effective Date, the aggregate number of Common Shares reserved for issuance under the Plan and which may
be issued upon exercise of Options shall not exceed 18,300,000 Common Shares, as constituted on the Effective Date. In addition,
as of the Effective Date, Options shall only be granted to the extent that the aggregate number of Common Shares which may be issued
upon the exercise of Options, including those issuable upon the exercise of Pre-Existing Options, does not exceed 18,300,000 Common
Shares, as constituted on the Effective Date. Any Common Shares subject to an Option governed by the Plan and which has been subsequently
cancelled or terminated in accordance with the terms of the Plan, without having been exercised, will again be available for issuance
pursuant to the exercise of Options granted under the Plan.

 

    	 	- 4 -	 

     

    

 

Section 4.02         Limits
on Grants to Insiders: With respect to Options granted to Insiders:

 

		(a)	the number of Common Shares issuable to Insiders at any
time under all security based compensation arrangements shall not exceed 10% of the total number of issued and outstanding Common
Shares on a non-diluted basis at such time; and

 

		(b)	the number of Common Shares issued to Insiders as a group
within a one year period under all security based compensation arrangements shall not exceed 10% of the total number of issued
and outstanding Shares as at the end of such one year period.

 

Section 4.03        Exercise
Price: The price per share at which any Common Share which is the subject of an Option may be purchased (the “Exercise
Price”) shall be determined by the Committee at the time the Option is granted, provided that such price shall be not
less than the closing market price of the Common Shares on the TSX on the day preceding the date of grant or, if the Common Shares
are not then listed on the TSX, on the most senior of any other exchange on which the Common Shares are then traded, on the last
trading day immediately preceding the date of grant of such Option.

 

Section 4.04        Term
of Options: The Option Period for each Option shall be such period of time as shall be determined by the Committee, provided
that no Option Period shall exceed 10 years except in the event that of an extension of the Expiry Time due to a black out period.
An Option Period shall expire at 4:00PM (Vancouver time) on the Expiry Date (the “Expiry Time”). The Committee
may determine the number or percentage of Common Shares which may be purchased by an Optionee pursuant to the exercise of Options
during any particular time period within the Option Period.

 

Section 4.05        Vesting:
The Committee may, at its discretion, determine and impose terms upon which each Option shall become Vested. In the event that
the Committee imposes a vesting schedule in respect of any Options granted to an Optionee, at any point in time the Optionee will
only be entitled to exercise those Options which are Vested at such point in time. Notwithstanding the foregoing, in the event
that a Pre-Existing Plan imposed vesting requirements on a Pre-Existing Option, such vesting requirements must be satisfied before
any such Pre-Existing Options shall become Vested.

 

ARTICLE FIVE

 

EXERCISE OF OPTION, EFFECT OF DEATH AND

TERMINATION OF EMPLOYMENT AND WITHHOLDING TAXES

 

Section 5.01         Exercise
of Option: Subject to: (i) any restriction on the number or percentage of Common Shares which may be purchased by the Optionee
during any particular time period within the Option Period as determined by the Committee; (ii) the vesting provisions applicable
to the Option, if any; and (iii) termination of the Option in accordance with the terms of the Plan, an Option may be exercised
by the Optionee in whole at any time, or in part from time to time, during the Option Period. An Option shall be exercisable by
delivering to the Corporation written notice specifying the number of Common Shares in respect of which the Option is exercised
together with payment in full of the Exercise Price for each Option exercised by way of certified cheque, bank draft, money order
or cash. Upon receipt of such notice and payment by the Corporation, there will be a binding contract for the issue of the Common
Shares in respect of which the Option is exercised, upon and subject to the provisions of the Plan. Upon an Optionee exercising
an Option and paying the Corporation the aggregate purchase price for the Common Shares in respect of which the Option has been
exercised, the Corporation shall as soon as practicable issue and deliver a certificate representing the Common Shares so purchased.

 

    	 	- 5 -	 

     

    

 

Section 5.02         Effect
of Death: If a Participant shall die while an Optionee, any Option held by such Optionee at the date of death shall be exercisable
in whole or in part only by the person or persons to whom the rights of the Optionee under the Option shall pass by the will of
the Optionee or the laws of descent and distribution for a period of one year after the date of death of the Optionee or prior
to the Expiry Time in respect of the Option, whichever is sooner, and then only to the extent that such Optionee was entitled to
exercise the Option at the date of death of such Optionee.

 

Section 5.03         Effect
of Ceasing to be a Participant – For Cause: If an Optionee shall cease to meet the criteria necessary to be a Participant
as a result of being terminated for cause, as that term is interpreted by the courts of the jurisdiction in which the Optionee
is employed or engaged, any outstanding Options held by such Optionee on the date of such termination, whether Vested or not, shall
be cancelled as of that date.

 

Section 5.04         Effect
of Ceasing to be a Participant – For Reasons Other than For Cause: If an Optionee shall cease to meet the criteria necessary
to be a Participant for reasons other than termination for cause or by virtue of death, any Option held by such Optionee at such
time shall remain exercisable in full at any time, and in part from time to time, for a period ending on the earlier of the Expiry
Time and three (3) months after the date on which the Optionee ceases to be a Participant, and then only to the extent that such
Optionee was entitled to exercise the Option on the date on which the Optionee ceased to be a Participant. Notwithstanding the
foregoing provisions of this Section 5.04, the Committee may, on a case by case basis, allow Options held by an Optionee that ceases
to meet the criteria necessary to be a Participant for reasons other than termination for cause or by virtue of death, to remain
exercisable in full at any time, and in part from time to time, for such period as the Committee determines but not after the Expiry
Time (without any additional Common Shares vesting) where such Expiry Time is more than three (3) months after the date on which
the Optionee ceases to be a Participant.

 

Section 5.05         Withholding
Taxes: The Corporation or any subsidiary of the Corporation may take such steps as are considered necessary or appropriate
for the withholding of any taxes which the Corporation or any subsidiary of the Corporation is required by any law or regulation
of any governmental authority whatsoever to withhold in connection with any Option including, without limiting the generality of
the foregoing, the withholding of all or any portion of any payment or the withholding of the issue of Common Shares to be issued
upon the exercise of any Option until such time as the Optionee has paid the Corporation or any subsidiary of the Corporation for
any amount which the Corporation or subsidiary of the Corporation is required to withhold with respect to such taxes.

 

ARTICLE SIX

 

CAPITAL CHANGES

 

Section 6.01         Share
Reorganization: Whenever the Corporation issues Common Shares to all or substantially all holders of Common Shares by way of
a stock dividend or other distribution, or subdivides all outstanding Common Shares into a greater number of Common Shares, or
combines or consolidates all outstanding Common Shares into a lesser number of Common Shares (each of such events being herein
called a “Share Reorganization”) then effective immediately after the record date for such dividend or other distribution
or the effective date of such subdivision, combination or consolidation:

 

		(a)	for each Option the Exercise Price will be adjusted to
a price per Common Share which is the product of:

 

		(i)	the Exercise Price in effect immediately before that
effective date or record date; and

 

    	 	- 6 -	 

     

    

 

		(ii)	a fraction, the numerator of which is the total number
of Common Shares outstanding on that effective date or record date before giving effect to the Share Reorganization, and the denominator
of which is the total number of Common Shares that are or would be outstanding immediately after such effective date or record
date after giving effect to the Share Reorganization; and

 

		(b)	the number of Unissued Option Shares will be adjusted
by multiplying (i) the number of Unissued Option Shares immediately before such effective date or record date by (ii) a fraction
which is the reciprocal of the fraction described in subsection (a)(ii).

 

6.02         Special
Distribution: Subject to the prior approval of the TSX, whenever the Corporation issues by way of a dividend or otherwise distributes
to all or substantially all holders of Common Shares;

 

(a)          shares
of the Corporation, other than the Common Shares;

 

(b)          evidences
of indebtedness;

 

(c)          any
cash or other assets, excluding cash dividends (other than cash dividends which the Directors have determined to be outside the
normal course); or

 

(d)          rights,
options or warrants;

 

then to the extent that such dividend or
distribution does not constitute a Share Reorganization (any of such non-excluded events being herein called a “Special
Distribution”), and effective immediately after the record date at which holders of Common Shares are determined for purposes
of the Special Distribution, for each Option the Exercise Price will be reduced, and the number of Unissued Option Shares will
be correspondingly increased, by such amount, if any, as is determined by the Directors in their sole and unfettered discretion
to be appropriate in order to properly reflect any diminution in value of the Option Shares as a result of such Special Distribution.

 

6.03         Corporate
Reorganization: Whenever there is:

 

		(a)	a reclassification of outstanding Common Shares, a change
of Common Shares into other shares or securities, or any other capital reorganization of the Corporation, other than as described
in Sections 6.01 or 6.02;

 

		(b)	a consolidation, merger or amalgamation of the Corporation
with or into another corporation resulting in a reclassification of outstanding Common Shares into other shares or securities
or an exchange of Common Shares into other shares or securities; or

 

		(c)	an arrangement or other transaction under which, among
other things, the business or assets of the Corporation become, collectively, the business and assets of two or more companies
with the same shareholder group upon the distribution to the Corporation’s shareholders, or the exchange with the Corporation’s
shareholders, of securities of the Corporation, or securities of another company, or both; or

 

		(d)	a transaction whereby all or substantially all of the
Corporation’s undertaking and assets become the property of another corporation;

 

(any such event being herein called a “Corporate
Reorganization”) the Optionee will have an option to purchase (at the times, for the consideration, and subject to the
terms and conditions set out in the Plan) and will accept on the exercise of such option, in lieu of the Unissued Option Shares
which he would otherwise have been entitled to purchase, the kind and amount of shares or other securities or property that he
would have been entitled to receive as a result of the Corporate Reorganization if, on the effective date thereof, he had been
the holder of all Unissued Option Shares or if appropriate, as otherwise determined by the Directors.

 

    	 	- 7 -	 

     

    

 

6.04         Spin-Out
Transaction: If pursuant to the operation of section 6.03(c) an Optionee receives options (the “New Options”)
to purchase securities of another company (the “New Company”) in respect of the Optionee’s Options (the “Subject
Options”), the New Options shall expire on the earlier of: (i) the Expiry Date of the Subject Options; (ii) if the Optionee
does not become a Participant in respect of the New Company, the date that the Subject Options expire pursuant to Sections 5.02,
5.03 or 5.04, as applicable; (iii) if the Optionee becomes a Participant in respect of the New Company, the date that the New Options
expire pursuant to the terms of the New Company’s stock option plan that correspond to Sections 5.02, 5.03 or 5.04 hereof; and
(iv) the date that is two (2) years after the Optionee ceases to be a Participant in respect of the New Company or such shorter
period as determined by the Board.

 

6.05         Determination
of Exercise Price and Number of Unissued Option Shares: If any questions arise at any time with respect to the Exercise Price
or number of Unissued Option Shares deliverable upon exercise of an Option following a Share Reorganization, Special Distribution
or Corporate Reorganization, such questions shall be conclusively determined by the Corporation’s auditor, or, if they decline
to so act, any other firm of Chartered Accountants in Vancouver, British Columbia, that the Directors may designate and who will
have access to all appropriate records and such determination will be binding upon the Corporation and all Optionees.

 

6.06         Regulatory
Approval: Any adjustment to the Exercise Price or the number of Unissued Option Shares purchasable under the Plan pursuant
to the operation of any provision of this Article Six is subject to the approval of the TSX and any other governmental authority
having jurisdiction.

 

ARTICLE SEVEN

 

TAKE-OVER BIDS AND CHANGES OF CONTROL

 

7.01        Effect
of a Take-Over Bid: If a bona fide offer (an “Offer”) for Common Shares is made to an Optionee or to shareholders
of the Corporation generally or to a class of shareholders which includes the Optionee, which Offer, if accepted in whole or in
part, would result in the offeror becoming a control person of the Corporation, within the meaning of subsection 1(1) of the Securities
Act, the Corporation shall, immediately upon receipt of notice of the Offer, notify each Optionee of full particulars of the Offer,
whereupon all Common Shares subject to such Option will become Vested and the Option may be exercised in whole or in part by the
Optionee so as to permit the Optionee to tender the Common Shares received upon such exercise, pursuant to the Offer. However,
if:

 

(a)          the
Offer is not completed within the time specified therein; or

 

(b)          all
of the Common Shares tendered by the Optionee pursuant to the Offer are not taken up or paid for by the offeror in respect thereof,

 

then the Common Shares received upon such
exercise, or in the case of clause (b) above, the Common Shares that are not taken up and paid for, may be returned by the Optionee
to the Corporation and reinstated as authorized but unissued Common Shares and with respect to such returned Common Shares, the
Option shall be reinstated as if it had not been exercised and the terms upon which such Common Shares were to become Vested pursuant
to this section shall be reinstated. If any Common Shares are returned to the Corporation under this Section 7.01, the Corporation
shall immediately refund the Exercise Price to the Optionee for such Common Shares.

 

    	 	- 8 -	 

     

    

 

7.02        Acceleration
of Expiry Time: If, at any time when an Option granted under the Plan remains unexercised, an Offer is made by an offeror,
the Directors may, upon notifying each Optionee of the full particulars of the Offer, declare all Common Shares issuable upon the
exercise of Options granted under the Plan, Vested, and declare that the Expiry Time for the exercise of all unexercised Options
granted under the Plan is accelerated so that all Options will either be exercised or will expire prior to the date upon which
Common Shares must be tendered pursuant to the Offer, provided such Offer is completed.

 

7.03        Compulsory
Acquisition or Going Private Transaction: If and whenever, following a take-over bid or issuer bid, there shall be a compulsory
acquisition of the Shares of the Company pursuant to Section 300 of the Business Corporations Act (British Columbia) or
any successor or similar legislation, or any amalgamation, merger or arrangement in which securities acquired in a formal take-over
bid may be voted under the conditions described in Section 8.2 of Multilateral Instrument 61-101 Protection of Minority Security
Holders in Special Transactions, then following the date upon which such compulsory acquisition, amalgamation, merger or arrangement
is effective, an Optionee shall be entitled to receive, and shall accept, for the same exercise price, in lieu of the number of
Shares to which such Optionee was theretofore entitled upon the exercise of his or her Options, the aggregate amount of cash, shares,
other securities or other property which such Optionee would have been entitled to receive as a result of such bid if he or she
had tendered such number of Shares to the take-over bid.

 

7.04        Effect
of a Change of Control: If a Change of Control occurs, all Common Shares subject to each outstanding Option will become Vested,
whereupon such Option may be exercised in whole or in part by the respective Optionee.

 

ARTICLE EIGHT

 

EFFECTIVE DATE OF PLAN, AMENDMENT

OF PLAN AND TERMINATION OF PLAN

 

Section 8.01         Effective
Date of Plan: The Plan is to be implemented and effective upon the approval of the Plan by the shareholders of the Corporation.
Such shareholder approval must be given by the affirmative vote of a majority of the Common Shares represented at the meeting of
the shareholders of the Corporation at which a motion to approve the Plan is presented.

 

Section 8.02         Amendment
of Plan: The Directors may from time to time, without shareholder approval and subject to applicable law and to the prior
approval, if required, of TSX or any other regulatory body having authority over the Corporation or the Plan, suspend, terminate
or discontinue the Plan at any time, or amend or revise the terms of the Plan or of any Option granted under the Plan to:

 

		(a)	make amendments of a clerical or typographical nature
and to include clarifying provisions in the Plan;

 

		(b)	implement features or requirements that are necessary
or desirable under applicable tax and securities laws;

 

		(c)	change vesting provisions;

 

		(d)	change termination provisions for an Insider provided
that the Expiry Time does not extend beyond the original Expiry Time under the Plan;

 

		(e)	change termination provisions for an Optionee who is
not an Insider beyond the original Expiry Time;

 

		(f)	reduce the Exercise Price of an Option for an Optionee
who is not an Insider; and

 

		(g)	implement a cashless exercise feature, payable in cash
or securities;

 

    	 	- 9 -	 

     

    

 

provided that no such amendment, revision,
suspension, termination or discontinuance shall in any manner adversely affect any Option previously granted to an Optionee under
the Plan without the consent of that Optionee.

 

Section 8.03         Amendments
Requiring Shareholder Approval: Any amendments to the Plan or Options granted thereunder, other than those described in Section
8.02 above, will be subject to the approval of the shareholders. For greater certainty, the Directors may not, without shareholder
approval and the prior approval, if required, of TSX, amend or revise the terms of the Plan or of any Option granted under the
Plan to:

 

		(a)	increase the Plan maximum or number of shares reserved
for issuance under the Plan;

 

		(b)	grant additional powers to the board of directors to
amend the Plan or individual Options without shareholder approval;

 

		(c)	reduce the exercise price of Options or other entitlements
held by insiders;

 

		(d)	extend to the term of Options held by insiders; and

 

		(e)	change the insider participation limits to those that
would have triggered the requirement for disinterested shareholder approval of the Plan under requirements of the TSX.

 

Section 8.04         Termination
of the Plan: The Plan may be terminated at any time by the Directors. Notwithstanding the termination of the Plan, any Option
outstanding under the Plan at the time of termination shall remain in effect until such Option has been exercised, has expired,
has been surrendered to the Corporation or has been terminated.

 

ARTICLE NINE

 

MISCELLANEOUS PROVISIONS

 

Section 9.01         Non-Assignable:
No rights under the Plan and no Option awarded pursuant to the provisions of the Plan are assignable or transferable by any Participant
other than pursuant to a will or by the laws of descent and distribution.

 

Section 9.02         Rights
as a Shareholder: No Optionee shall have any rights as a shareholder of the Corporation with respect to any Common Shares which
are the subject of an Option. No Optionee shall be entitled to receive, and no adjustment shall be made for, any dividends, distributions
or other rights declared for shareholders of the Corporation for which the record date is prior to the date of exercise of any
Option.

 

Section 9.03         No
Contract of Employment: Nothing contained in the Plan shall confer or be deemed to confer upon any Participant the right to
continue in the employment of the Corporation or any subsidiary of the Corporation nor interfere or be deemed to interfere in any
way with any right of the Corporation or any subsidiary of the Corporation to discharge any Participant at any time for any reason
whatsoever, with or without cause.

 

    	 	- 10 -	 

     

    

 

Section 9.04         Exclusion
From Severance Allowance, Retirement Allowance or Termination Settlement: If an Optionee retires, resigns or is terminated
from employment or engagement with the Corporation or any subsidiary of the Corporation, the loss or limitation, if any, pursuant
to the Option Agreement with respect to the right to purchase Option Shares which were not Vested at that time or which, if Vested,
were cancelled, shall not give rise to any right to damages and shall not be included in the calculation of nor form any part of
any severance allowance, retiring allowance or termination settlement of any kind whatsoever in respect of such Optionee.

 

Section 9.05         Necessary
Approvals: The obligation of the Corporation to grant any Option pursuant to the Plan and to issue, sell and deliver any Common
Shares on the exercise of an Option is subject to the approval of any governmental authority or regulatory body required in connection
with the grant of such Option or the issue, sale and delivery of such Common Shares by the Corporation. Any Options granted prior
to the Corporation’s receipt of such required approvals shall be conditional upon such approval being given and no Options
may be exercised unless such approval has been given.

 

In the event that any Common Shares cannot
be issued to any Optionee pursuant to the exercise of an Option for any reason whatsoever including, without limiting the generality
of the foregoing, the failure to obtain any required approval, then the obligation of the Corporation to issue such Common Shares
shall terminate and any money paid to the Corporation in connection with the exercise of such Option shall be returned to the Optionee
without interest or deduction.

 

Section 9.06         Form
of Notice: A notice given to the Corporation shall be in writing, signed by the Optionee and delivered to the head business
office of the Corporation.

 

Section 9.07         Conflict:
In the event of any conflict between the provisions of this Plan and an Option Agreement, the provisions of this Plan shall govern.

 

Section 9.08         Time
of Essence: Time is of the essence of this Plan and of each Option Agreement. No extension of time will be deemed to be or
to operate as a waiver of the essentiality of time.

 

Section 9.09         Entire
Agreement: This Plan and the applicable Option Agreement set out the entire agreement between the Corporation and the applicable
Optionee relative to the subject matter hereof and supersede all prior agreements, undertakings and understandings, whether oral
or written.

 

Section 9.10         No
Representation or Warranty: The Corporation makes no representation or warranty as to the value of any Option granted pursuant
to the Plan or as the future value of any Common Shares issued pursuant to the exercise of any Option.

 

Section 9.11         Compliance
with Applicable Law: If any provision of the Plan or any Option contravenes any law or any order, policy, by-law or regulation
of any regulatory body having jurisdiction, then such provision shall be deemed to be amended to the extent necessary to bring
such provision into compliance therewith.

 

Section 9.12         Applicable
Law: The Plan and all of the rights and obligations arising herefrom shall be interpreted and applied in accordance with the
laws of the Province of British Columbia.

 

Effective date of Original Plan: September
6, 2018

 

	  //Trevor L. Cunningham//	 
	Trevor L. Cunningham	 
	Chief Financial Officer and VP Finance	 

 

    	 	- 11 -	 

     

    

 

SCHEDULE “A”

 

NORZINC LTD.

 

STOCK OPTION PLAN - OPTION AGREEMENT

 

This Option Agreement
is entered into between NorZinc Ltd. (the “Corporation”) and the Optionee named below pursuant to the Corporation’s
Stock Option Plan (the “Plan”), a copy of which is attached hereto, and confirms that:

 

		1.	on ●, 20● (the “Grant Date”);

 

		2.	● (the “Optionee”);

 

		3.	was granted the option (the “Option”)
to purchase ● Common Shares (the “Option Shares”) of the Corporation;

 

		4.	for the price (the “Option Price”) of
$● per share;

 

		5.	which shall be exercisable in full upon approval [OR
set forth applicable vesting schedule];

 

		6.	terminating on the ●, 20● (the “Expiry Date”);

 

all on the terms and subject to the conditions
set out in the Plan. For greater certainty, Option Shares continue to be exercisable until the termination or cancellation thereof
as provided in this Option Agreement and the Plan.

 

The Optionee acknowledges
that any Option Shares received by him upon exercise of the Option have not been registered under the United States Securities
Act of 1933, as amended, or the Blue Sky laws of any state (collectively, the “Securities Acts”). The Optionee
acknowledges and understands that the Company is under no obligation to register, under the Securities Acts, the Option Shares
received by him or to assist him in complying with any exemption from such registration if he should at a later date wish to dispose
of the Option Shares.

 

[Following to be included in Option
Agreements with “U.S. Persons” - The Optionee acknowledges that the Option Shares shall bear a legend restricting
the transferability thereof, such legend to be substantially in the following form:

 

“The shares represented by this
certificate have not been registered or qualified under the United States Securities Act of 1933, as amended or state securities
laws. The shares may not be offered for sale, sold, pledged or otherwise disposed of unless so registered or qualified, unless
an exemption exists or unless such disposition is not subject to U.S. federal or state securities laws, and the Company may require
that the availability of any exemption or the inapplicability of such securities laws be established by an opinion of counsel,
which opinion of counsel shall be reasonably satisfactory to the Company.”]

 

By signing this Option
Agreement, the Optionee acknowledges that the Optionee has read and understands the Plan and agrees to the terms and conditions
of the Plan and this Option Agreement.

 

Acknowledgement – Personal Information

 

The undersigned hereby acknowledges and
consents to:

 

		(a)	the disclosure to all regulatory authorities of all personal
information of the undersigned obtained by the Corporation; and

 

		(b)	the collection, use and disclosure of such personal information
by the all regulatory authorities in accordance with their requirements, including the provision to third party service providers,
from time to time.

 

    	 	- 12 -	 

     

    

 

IN WITNESS WHEREOF
the parties hereto have executed this Option Agreement as of the ● day of ●, 20●.

 

	 	 	NORZINC LTD.
	 	 	 
	 	 	Per:	 
	Signature	 	    Authorized Signatory
	 	 	 
	Print Name	 	 
	 	 	 
	Address	 	 
	 	 	 

 

    	 	- 13 -

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