Document:

1998 Management Share Incentive Plan

 Exhibit 10(a) 
 MINE SAFETY APPLIANCES COMPANY 
 1998 MANAGEMENT SHARE INCENTIVE PLAN 
 (As Amended March 10, 1999) 
 SECTION 1.
PURPOSE. 
 The purpose of the 1998 Management Share Incentive Plan of Mine Safety Appliances Company (the “Plan”) is to benefit
the Company’s shareholders by encouraging high levels of performance by individuals whose performance is a key element in achieving the Company’s continued success by rewarding the creation of shareholder value, and to enable the Company
to recruit, reward, retain and motivate employees to work as a team to achieve the Company’s goals. 
 SECTION 2. DEFINITIONS IN LAST SECTION.

 For purposes of the Plan, capitalized terms, unless defined where the respective term first appears in this Plan, shall have the
meanings given in the last Section hereof. 
 SECTION 3. ELIGIBILITY. 
 Awards may be granted only to Employees who are designated as Participants from time to time by the Committee. The Committee shall determine which Employees shall be Participants, the types of Awards to be made to
Participants and the terms, conditions and limitations applicable to the Awards. 
 SECTION 4. AWARDS. 
 Awards may include, but are not limited to, those described in this Section 4. The Committee may grant Awards singly, in tandem or in combination
with other Awards, as the Committee may in its sole discretion determine; provided that Stock Options may not be granted in tandem with Incentive Stock Options. Subject to the other provisions of this Plan, Awards may also be granted in combination
or in tandem with, in replacement of, or as alternatives to, grants or rights under this Plan and any other employee benefit or compensation plan of the Company. 
 4.1 Stock Options 
 A Stock Option is a right to purchase a specified number of Shares at a specified price during such
specified time as the Committee shall determine. 
  

	 	(a)	Options granted may be either of a type that complies with the requirements of incentive stock options as defined in Section 422 of the Code (“Incentive Stock
Options”) or of a type that does not comply with such requirements (“Non-Qualified Stock Options”). The requirements imposed by the Code and the regulations thereunder for qualification as an Incentive Stock Option, whether or not
specified in this Plan, shall be deemed incorporated within any Award Agreement pertaining to an Incentive Stock Option. 

  

	 	(b)	The exercise price per Share of any Stock Option which is intended to be an Incentive Stock Option shall be no less than the Fair Market Value per Share subject to the option on the
date the Stock Option is granted, except that in the case of an Incentive Stock Option granted to an Employee who, immediately prior to such grant, owns stock possessing more than ten percent (10%) of the total combined voting power of all
classes of stock of the Company or any subsidiary (a “Ten Percent Employee”), the exercise price per Share shall not be less than one hundred ten percent (110%) of such Fair Market Value per Share on the date the Incentive Stock
Option is granted. For purposes of this Section 4.1(b), an individual (i) shall be considered as owning not only shares of stock owned individually but also all shares of stock that are at the time owned, directly or indirectly, by or for
the spouse, ancestors, lineal descendants and brothers and sisters (whether by the whole or half blood) of such individual and (ii) shall be considered as owning proportionately any shares owned, directly or indirectly, by or for any
corporation, partnership, estate or trust in which such individual is a shareholder, partner or beneficiary. 

  

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	 	(c)	The term of any Stock Option which is intended to be an Incentive Stock Option shall not be greater than ten years from its date of grant, except that in the case of a Ten Percent
Employee, such term shall not be greater than five years. 

  

	 	(d)	A Stock Option may be exercised, in whole or in part, by giving written notice of exercise to the Company, specifying the number of Shares to be purchased. 

 

	 	(e)	The exercise price of the Stock Option may be paid in cash or, at the discretion of the Committee, may also be paid by the tender of Stock already owned by the Participant, or
through a combination of cash and Stock, or through such other means the Committee determines are consistent with the Plan’s purpose and applicable law. No fractional Shares will be issued or accepted. 

  

	 	(f)	Notwithstanding any other provision contained in the Plan or in any Award Agreement, but subject to the possible exercise of the Committee’s discretion contemplated in the last
sentence of this Section 4.1(f), the aggregate Fair Market Value on the date of grant, of the Shares with respect to which Incentive Stock Options are exercisable for the first time by an Employee during any calendar year under all plans of the
corporation employing such Employee, any parent or subsidiary corporation of such corporation and any predecessor corporation of any such corporation shall not exceed $100,000. If the date on which one or more of such Incentive Stock Options could
first be exercised would be accelerated pursuant to any provision of the Plan or any Award Agreement, and the acceleration of such exercise date would result in a violation of the restriction set forth in the preceding sentence, then,
notwithstanding any such provision, but subject to the provisions of the next succeeding sentence, the exercise dates of such Incentive Stock Options shall be accelerated only to the date or dates, if any, that do not result in a violation of such
restriction and, in such event, the exercise dates of the Incentive Stock Options with the lowest option prices shall be accelerated to the earliest such dates. The Committee may, in its discretion, authorize the acceleration of the exercise date of
one or more Incentive Stock Options even if such acceleration would violate the $100,000 restriction set forth in the first sentence of this paragraph and even if such Incentive Stock Options are thereby converted in whole or in part to
Non-Qualified Stock Options. 

 4.2 Stock Appreciation Rights 
 A Stock Appreciation Right is a right to receive, upon surrender of the right, an amount payable in cash and/or Shares under such terms and conditions as
the Committee shall determine. 
  

	 	(a)	A Stock Appreciation Right may be granted in tandem with part or all of (or in addition to, or completely independent of) a Stock Option or any other Award under this Plan. A Stock
Appreciation Right issued in tandem with a Stock Option may be granted at the time of grant of the related Stock Option or at any time thereafter during the term of the Stock Option; provided, however, that a Stock Appreciation Right issued in
tandem with an Incentive Stock Option can only be granted at the time of grant of the Incentive Stock Option. 

  

	 	(b)	The amount payable in cash and/or Shares with respect to each right shall be equal in value to a percentage (including up to 100%) of the amount by which the Fair Market Value per
Share on the exercise date exceeds the Fair Market Value per Share on the date of grant of the Stock Appreciation Right. The applicable percentage shall be established by the Committee. The Award Agreement may state whether the amount payable is to
be paid wholly in cash, wholly in Shares or partly in each; if the Award Agreement does not so state the manner of payment, the Committee shall determine such manner of payment at the time of payment. The amount payable in Shares, if any, is
determined with reference to the Fair Market Value per Share on the date of exercise. 

  

	 	(c)	Stock Appreciation Rights issued in tandem with Stock Options shall be exercisable only to the extent that the Stock Options to which they relate are exercisable. Upon exercise of
the tandem Stock Appreciation Right, and to the extent of such exercise, the Participant’s underlying Stock Option shall automatically terminate. Similarly, upon the exercise of the tandem Stock Option, and to the extent of such exercise, the
Participant’s related Stock Appreciation Right shall automatically terminate. 

  

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	 	(d)	Notwithstanding any other provision of this Plan to the contrary, with respect to a Stock Appreciation Right granted in connection with an Incentive Stock Option: (i) the Stock
Appreciation Right will expire no later than the expiration of the underlying Incentive Stock Option; (ii) the value of the payout with respect to the Stock Appreciation Right may be for no more than one hundred percent (100%) of the
difference between the exercise price of the underlying Incentive Stock Option and the Fair Market Value of the Shares subject to the underlying Incentive Stock Option at the time the Stock Appreciation Right is exercised; and (iii) the Stock
Appreciation Right may be exercised only when the Fair Market Value of the Shares subject to the Incentive Stock Option exceeds the per Share exercise price of the Incentive Stock Option. 

 4.3 Restricted Stock 
 Restricted Stock is Stock that
is issued to a Participant and is subject to such terms, conditions and restrictions as the Committee deems appropriate, which may include, but are not limited to, restrictions upon the sale, assignment, transfer or other disposition of the
Restricted Stock and the requirement of forfeiture of the Restricted Stock upon termination of employment under certain specified conditions. The Committee may provide for the lapse of any such term or condition or waive any term or condition based
on such factors or criteria as the Committee may determine. Subject to the restrictions stated in this Section 4.3 and in the applicable Award Agreement, the Participant shall have, with respect to Awards of Restricted Stock, all of the rights
of a shareholder of the Company, including the right to vote the Restricted Stock and the right to receive any cash dividends on such Stock. Unless otherwise determined by the Committee, dividends or other distributions on Restricted Stock which are
paid in Shares or other securities or property shall be held subject to the same terms, conditions and restrictions as the Restricted Stock on which they are paid. 
 4.4 Performance Awards 
 Performance Awards may be granted under this Plan from time to time based on such terms and
conditions as the Committee deems appropriate; provided that such Awards shall not be inconsistent with the terms and purposes of this Plan. Performance Awards are Awards the payment or vesting of which is contingent upon the achievement of
specified levels of performance under specified Performance Criteria during a specified Performance Period by the Company, a subsidiary or subsidiaries, any branch, department or other portion thereof or the Participant individually, as determined
by the Committee at the time the Performance Award is granted. Performance Awards may be in the form of performance units, performance shares and such other forms of Performance Awards as the Committee shall determine. The maximum amount that may be
paid in cash or in Fair Market Value (determined as of the date of payment or vesting) of Shares or other securities under all Performance Awards under the Plan paid to any one Participant during a calendar year shall in no event exceed $200,000.

 4.5 Other Awards 
 The Committee may
from time to time grant Stock, other Stock-based and non-Stock-based Awards under the Plan (singly, in tandem or in combination with other Awards), including without limitation those Awards pursuant to which Shares are or may in the future be
acquired, Awards denominated in Stock units, securities convertible into Stock, phantom securities, dividend equivalents and cash. The Committee shall determine the terms and conditions of such other Stock, Stock-based and non-Stock-based Awards,
provided that such Awards shall not be inconsistent with the terms and purposes of this Plan. 
 SECTION 5. AWARD AGREEMENTS. 
 Each Award under this Plan shall be evidenced by an Award Agreement setting forth the number of Shares or other securities, Stock Appreciation Rights, or
units subject to the Award, if any, and such other terms and conditions applicable to the Award (and not inconsistent with this Plan) as are determined by the Committee. 
  

	 	(a)	Award Agreements shall include the following terms: 

  

	 	(i)	Non-assignability: A provision that the relevant Award shall not be assigned, pledged or otherwise transferred except by will or by the laws of descent and distribution and that
during the lifetime of a Participant, the Award shall be exercised only by such Participant or by the Participant’s guardian or legal representative; provided, however, that, in the Committee’s discretion, and except in the case of
Incentive Stock Options, an Award Agreement may expressly provide for specifically limited transferability. 

  

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	 	(ii)	Termination of Employment: A provision describing the treatment of an Award in the event of the Retirement, Disability, death or other termination of a Participant’s employment
with the Company, including but not limited to terms relating to the vesting, time for exercise, forfeiture or cancellation of an Award in such circumstances. 

  

	 	(iii)	Rights as Shareholder: A provision that a Participant shall have no rights as a shareholder with respect to any securities covered by an Award until the date the Participant becomes
the holder of record. Except as provided in Section 8 hereof, no adjustment shall be made for dividends or other rights, unless the Award Agreement specifically requires such adjustment, in which case, grants of dividend equivalents or similar
rights shall not be considered to be a grant of any other shareholder right. 

  

	 	(iv)	Withholding: A provision requiring the withholding of applicable taxes required by law from all amounts paid in satisfaction of an Award to a Participant. In the case of an Award
paid in cash, the withholding obligation shall be satisfied by withholding the applicable amount and paying the net amount in cash to the Participant. In the case of Awards paid in Shares or other securities of the Company, (i) a Participant
may satisfy the withholding obligation by paying the amount of any taxes in cash, (ii) with the approval of the Committee (or, in the case of deduction, by the unilateral action of the Committee), Shares or other securities may be deducted by
the Company from the payment or delivered to the Company by the Participant to satisfy the obligation in full or in part as long as such withholding or delivery of Shares or other securities does not violate any applicable laws, rules or regulations
of federal, state or local authorities. The number of Shares or other securities to be deducted or delivered shall be determined by reference to the Fair Market Value of such Shares or securities on the applicable date. 

  

	 	(b)	Award Agreements may include such other terms as are necessary and appropriate to effect an Award to the Participant, including but not limited to (i) the term of the Award,
(ii) vesting provisions, (iii) deferrals, (iv) any requirements for continued employment with the Company, (v) any other restrictions or conditions (including performance requirements) on the Award and the method by which
restrictions or conditions lapse, (vi) the effect upon the Award of a Change in Control, (vii) the price, amount or value of Awards, (viii) such Participant’s permitted transferees, if any, (ix) all Shares issued or issuable
to such Participant in connection with an Award in the event of such Participant’s termination of employment, and (x) any other terms and conditions which the Committee shall deem necessary and desirable. 

 SECTION 6. SHARES OF STOCK SUBJECT TO THE PLAN. 
  

	 	(a)	Subject to the adjustment provisions of Section 8 hereof, the maximum aggregate number of Shares which may be granted pursuant to the Plan is 600,000 Shares.

  

	 	(b)	Any Shares which are subject to any unexercised or undistributed portion of any terminated, expired, exchanged or forfeited Award (or Awards settled in cash in lieu of Shares) shall
become available for grant pursuant to new Awards. 

  

	 	(c)	The Committee may make such additional rules for determining the number of Shares granted under the Plan as it deems necessary or appropriate. 

  

	 	(d)	The Stock which may be issued pursuant to an Award under the Plan may be treasury Stock or authorized but unissued Stock or Stock acquired, subsequently or in anticipation of the
transaction, in the open market or otherwise to satisfy the requirements of the Plan, or any combination of such Stock. 

  

	 	(e)	Subject to the adjustment provisions of Section 8 hereof, the maximum aggregate number of Shares available for grants of Stock Options or Stock Appreciation Rights to any one
Participant under the Plan shall not exceed 300,000 Shares. The limitation in the preceding sentence shall be interpreted and applied in a manner consistent with Section 162(m) of the Code. 

  

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 SECTION 7. ADMINISTRATION. 
  

	 	(a)	The Plan and all Awards granted pursuant thereto shall be administered by the Committee so that, insofar as is possible and practicable, transactions with respect to Awards under
the Plan shall be exempt from Section 16(b) of the Exchange Act. A majority of the members of the Committee shall constitute a quorum. The vote of a majority of a quorum (or the unanimous consent in writing of the members of the Committee)
shall constitute action by the Committee. 

  

	 	(b)	The Committee shall periodically determine the Participants in the Plan and the nature, amount, pricing, timing, and other terms of Awards to be made to such individuals.

  

	 	(c)	The Committee shall have the power to interpret and administer the Plan. All questions of interpretation with respect to the Plan, the number of Shares or other securities, Stock
Appreciation Rights, or units granted, and the terms of any Award Agreements shall be determined by the Committee, and its determination shall be final and conclusive upon all parties in interest. In the event of any conflict between an Award
Agreement and the Plan, the terms of the Plan shall govern. 

  

	 	(d)	The Committee may delegate to the officers or employees of the Company the authority to execute and deliver such instruments and documents, to do all such ministerial acts and
things, and to take all such other ministerial steps deemed necessary, advisable or convenient for the effective administration of the Plan in accordance with its terms and purpose. 

  

	 	(e)	Notwithstanding the foregoing provisions of this Section 7, no power given the Committee herein shall be used after a Change in Control to affect detrimentally the rights of
any Participant with respect to any Awards hereunder which are outstanding immediately prior to the Change in Control. 

 SECTION 8.
EQUITABLE ADJUSTMENTS. 
 Subject to any required action by the Company’s shareholders, upon the occurrence of any event which
affects the Shares in such a way that an adjustment of outstanding Awards is appropriate in order to prevent the dilution or enlargement of rights under the Awards (including, without limitation, any extraordinary dividend or other distribution
(whether in cash or in kind), recapitalization, stock split, reverse split, reorganization, merger, consolidation, spin-off, combination, repurchase, or share exchange, or other similar corporate transaction or event), the Committee shall make
appropriate equitable adjustments, which may include, without limitation, adjustments to any or all of the number and kind of Shares (or other securities) which may thereafter be issued in connection with such outstanding Awards and adjustments to
any exercise price specified in the outstanding Awards and shall also make appropriate equitable adjustments to the number and kind of Shares (or other securities) authorized by or to be granted under the Plan. 
 SECTION 9. CHANGE IN CONTROL. 
 Notwithstanding any
other provision of the Plan to the contrary, and unless the applicable Award Agreement shall otherwise provide, immediately prior to any Change in Control of the Company, (i) all Stock Options and freestanding Stock Appreciation Rights which
are then outstanding hereunder shall become fully vested and exercisable, (ii) all restrictions with respect to Shares of Restricted Stock which are then outstanding hereunder shall lapse, and such Shares shall be fully vested and
nonforfeitable, and (iii) with respect to all Performance Awards which are then outstanding hereunder, all uncompleted Performance Periods shall be deemed to have been completed, the target level of performance set forth with respect to each
Performance Criterion under such Performance Awards shall be deemed to have been attained and a pro rata portion (based on the ratio of (i) the number of full and partial months which have elapsed from the beginning of the Performance Period
through the Change in Control to (ii) the number of months originally contained in the Performance Period) of each such Performance Award shall become payable to the respective Participant, with the remainder of each such Performance Award
being cancelled for no value. 
  

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 SECTION 10. RIGHTS OF EMPLOYEES. 
  

	 	(a)	Status as an eligible Employee shall not be construed as a commitment that any Award will be made under the Plan to such eligible Employee or to eligible Employees generally.

  

	 	(b)	Nothing contained in the Plan (or in any other documents related to this Plan or to any Award) shall confer upon any Employee or Participant any right to continue in the employ of
the Company or any of its subsidiaries or constitute any contract or limit in any way the right of the Company or any subsidiary to change such person’s compensation or other benefits or to terminate the employment of such person with or
without cause. 

 SECTION 11. COMPLIANCE WITH APPLICABLE LEGAL REQUIREMENTS. 
 Awards shall be subject to the requirement that if at any time the Committee shall determine, in its discretion, that the listing, registration or
qualification of the Shares subject to the Awards upon any securities exchange or under any state or federal securities or other law or regulation, or the consent or approval of any governmental regulatory body, is necessary or desirable as a
condition to or in connection with the granting of the Awards or the issuance or purchase of Shares thereunder, no Awards may be granted or exercised, in whole or in part, unless such listing, registration, qualification, consent or approval shall
have been effected or obtained free of any conditions not acceptable to the Committee. The holders of such Awards will supply the Company with such certificates, representations and information as the Company shall request and shall otherwise
cooperate with the Company in obtaining such listing, registration, qualification, consent or approval. 
 SECTION 12. AMENDMENT AND TERMINATION.

 The Board may at any time amend, suspend or terminate the Plan. The Committee may at any time alter or amend any or all Award
Agreements under the Plan to the extent permitted by law. However, no such action by the Board or by the Committee shall impair the rights of Participants under outstanding Awards without the consent of the Participants affected thereby. Further,
the Board shall not amend the Plan without the approval of the Company’s shareholders to the extent such approval is required by law, agreement or the rules of any exchange upon which the Stock shall be listed (or if the Stock shall be admitted
to quotation on the National Association of Securities Dealers Automated Quotation (“NASDAQ”) System, the rules of NASDAQ). 
 SECTION 13.
UNFUNDED PLAN. 
 The Plan shall be unfunded. Neither the Company nor the Board shall be required to segregate any assets that may at any
time be represented by Awards made pursuant to the Plan. Neither the Company, the Committee, nor the Board shall be deemed to be a trustee of any amounts to be paid under the Plan. 
 SECTION 14. LIMITS OF LIABILITY. 
  

	 	(a)	Any liability of the Company to any Participant with respect to an Award shall be based solely upon contractual obligations created by the Plan and the Award Agreement.

  

	 	(b)	Neither the Company nor any member of the Board or of the Committee, nor any other person participating in any determination of any question under the Plan, or in the
interpretation, administration or application of the Plan, shall have any liability to any party for any action taken or not taken, in good faith under the Plan. 

 SECTION 15. EFFECTIVE DATE AND DURATION OF THE PLAN. 
 The Plan shall become effective upon its
adoption by the Board (the “Effective Date”); provided, however, that the grant of any Award shall be subject to and contingent upon obtaining the approval of this Plan by the Company’s shareholders within twelve (12) months
after the date the Plan is adopted by the Board. Subject to obtaining such approval, the Committee shall have authority to grant Awards hereunder from the Effective Date until the tenth (10th) anniversary of the Effective Date, subject to the
ability of the Board to terminate the Plan as provided in Section 12 hereof. 
  

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 SECTION 16. 1987 MANAGEMENT SHARE INCENTIVE PLAN. 
 Outstanding grants of options, Restricted Stock and all other outstanding awards under the Company’s 1987 Management Share Incentive Plan shall
continue to be subject to, and administered in accordance with, the terms of that plan. 
 SECTION 18. DEFINITIONS. 
 For purposes of the Plan, the following terms, as used herein, shall have the respective meanings specified: 
  

	 	(a)	“Affiliate” shall have the meaning set forth in Rule 12b-2 promulgated under Section 12 of the Exchange Act. 

  

	 	(b)	“Award” or “Awards” means an award granted pursuant to Section 4 hereof. 

  

	 	(c)	“Award Agreement” means an agreement described in Section 5 hereof entered into between the Company and a Participant, setting forth the terms, conditions and any
limitations applicable to the Award granted to the Participant. 

  

	 	(d)	“Beneficial Owner” shall have the meaning set forth in Rule 13d-3 under the Exchange Act. 

  

	 	(e)	“Beneficiary” means a person or persons designated by a Participant (if the terms of the relevant Award Agreement permit such a designation) to receive, in the event of
death, any unpaid portion of an Award held by the Participant. Any Participant so permitted by an Award Agreement may, subject to such limitations as may be prescribed by the Committee, designate one or more persons primarily or contingently as
beneficiaries in writing upon forms supplied by and delivered to the Company, and may revoke such designations in writing. If a Participant having a right to designate a beneficiary under an Award Agreement fails effectively to designate a
beneficiary, then the Award will be paid in the following order of priority: 

  

	 	(I)	Surviving spouse; 

  

	 	(II)	Surviving children in equal shares; or 

  

	 	(III)	To the estate of the Participant. 

  

	 	(f)	“Board” means the Board of Directors of the Company as it may be comprised from time to time. 

  

	 	(g)	A “Change in Control” shall be deemed to have occurred if the event set forth in any one of the following paragraphs of this Section 18(g) shall have occurred:

  

	 	(I)	any Person is or becomes the Beneficial Owner, directly or indirectly, of securities of the Company (not including in the securities beneficially owned by such Person any securities
acquired directly from the Company or its Affiliates) representing thirty percent (30%) or more of the combined voting power of the Company’s then outstanding securities, excluding any Person who becomes such a Beneficial Owner in
connection with a transaction described in clause (i) of paragraph (III) below; or 

  

	 	(II)	the following individuals cease for any reason to constitute a majority of the number of directors then serving: individuals who, on March 11, 1998, constitute the Board and
any new director (other than a director whose initial assumption of office is in connection with an actual or threatened election contest, including but not limited to a consent solicitation, relating to the election of directors of the Company)
whose appointment or election by the Board or nomination for election by the Company’s shareholders was approved or recommended by a vote of at least two-thirds (2/3) of the directors then still in office who either were directors on
March 11, 1998 or whose appointment, election or nomination for election was previously so approved or recommended; or 

  

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	 	(III)	there is consummated a merger or consolidation of the Company or any direct or indirect subsidiary of the Company with any other corporation, other than (i) a merger or
consolidation which would result in the voting securities of the Company outstanding immediately prior to such merger or consolidation continuing to represent (either by remaining outstanding or by being converted into voting securities of the
surviving entity or any parent thereof), in combination with the ownership of any trustee or other fiduciary holding securities under an employee benefit plan of the Company or any subsidiary of the Company, at least fifty-one percent (51%) of
the combined voting power of the securities of the Company or such surviving entity or any parent thereof outstanding immediately after such merger or consolidation, or (ii) a merger or consolidation effected to implement a recapitalization of
the Company (or similar transaction) in which no Person is or becomes the Beneficial Owner, directly or indirectly, of securities of the Company representing thirty percent (30%) or more of the combined voting power of the Company’s then
outstanding securities; or 

  

	 	(IV)	the shareholders of the Company approve a plan of complete liquidation or dissolution of the Company or there is consummated an agreement for the sale or disposition by the Company
of all or substantially all of the Company’s assets, other than a sale or disposition by the Company of all or substantially all of the Company’s assets to an entity, at least fifty-one percent (51%) of the combined voting power of
the voting securities of which are owned by shareholders of the Company in substantially the same proportions as their ownership of the Company immediately prior to such sale. 

 Notwithstanding the foregoing, a “Change in Control” shall not be deemed to have occurred by virtue of the consummation of any transaction or
series of integrated transactions immediately following which the record holders of the Stock of the Company immediately prior to such transaction or series of transactions continue to have substantially the same proportionate ownership in an entity
which owns all or substantially all of the assets of the Company immediately following such transaction or series of transactions. 
  

	 	(h)	“Code” means the Internal Revenue Code of 1986, as amended from time to time, or any successor statute. References to specified provisions of the Code shall also include
any successor provisions. 

  

	 	(i)	“Committee” means a committee of the Board appointed to administer the Plan (which committee may also be the Compensation Committee of the Board). The Committee shall be
composed of two or more directors as appointed from time to time to serve by the Board. If for any reason a Committee shall not have been appointed by the Board, the Board shall serve as such Committee. 

  

	 	(j)	“Company” means Mine Safety Appliances Company, a Pennsylvania corporation, or any successor corporation (except that Company shall not mean any successor corporation
thereto in determining under Section 18(g) hereof whether or not any Change in Control of the Company has occurred). 

  

	 	(k)	“Disability” shall mean the inability, in the opinion of the Committee, of a Participant, because of an injury or sickness, to work at a reasonable occupation which is
available with the Company or at any gainful occupation to which the Participant is or may become fitted, except that in the case of Incentive Stock Options, Disability shall mean permanent and total disability as defined in Section 422(e)(3)
of the Code. 

  

	 	(l)	“Employee” means any individual who is an employee of the Company or any Participating Subsidiary. 

  

	 	(m)	“Exchange Act” means the Securities Exchange Act of 1934, as amended and in effect from time to time, or any successor statute. 

  

	 	(n)	“Fair Market Value” of a Share, unless otherwise provided in the applicable Award Agreement, means: 

  

	 	(I)	If the Stock is admitted to trading on one or more national securities exchanges, 

  

	 	(A)	the average of the reported highest and lowest sale prices per Share as reported on the reporting system selected by the Committee on the relevant date; or 

 

	 	(B)	in the absence of reported sales on that date, the average of the reported highest and lowest sales prices per Share on the last previous day for which there was a reported sale; or

  

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	 	(II)	If the Stock is not admitted to trading on any national securities exchange, but is admitted to quotation on the NASDAQ System and has been designated as a NASDAQ National Market
(“NNM”) security, 

  

	 	(A)	the average of the reported highest and lowest sale prices per Share as reported on NASDAQ on the relevant date; or 

  

	 	(B)	in the absence of reported sales on that date, the average of the reported highest and lowest sales prices per Share on the last previous day for which there was a reported sale; or

  

	 	(III)	If the Stock is not admitted to trading on any national securities exchange, but is admitted to quotation on NASDAQ as a NASDAQ SmallCap Market security (and has not been designated
as a NNM security), the average of the highest bid and lowest asked prices per Share on the relevant date; or 

  

	 	(IV)	If the preceding clauses (I), (II) and (III) do not apply, the Fair Market Value determined by the Committee, using such criteria as it shall determine, in good faith and in its
sole discretion, to be appropriate for such valuation. 

  

	 	(o)	“Participant” means an Employee who has been designated by the Committee to receive an Award Pursuant to this Plan. 

  

	 	(p)	“Participating Subsidiary” means a subsidiary of the Company, of which the Company beneficially owns (whether at the date of adoption of this Plan or at a later date),
directly or indirectly, more than 50% of the aggregate voting power of all outstanding classes and series of stock. 

  

	 	(q)	“Performance Award” means an Award which is granted pursuant to Section 4.4 hereof and is contingent upon the performance of all or a portion of the Company and/or
its subsidiaries and/or which is contingent upon the individual performance of the Participant to whom it is granted. 

  

	 	(r)	“Performance Criteria” means one or more preestablished, objective measures of performance during a Performance Period by the Company, a subsidiary or subsidiaries, any
department or other portion thereof or the Participant individually, selected by the Committee in its discretion to determine whether a Performance Award has been earned in whole or in part. Performance Criteria may be based on earnings or earnings
per share; earnings before interest and taxes; return on equity, assets or investment; sales, gross profits or expenses; or stock price. Performance Criteria based on such performance measures may be based either on the level of performance of the
Company, subsidiary or portion thereof under such measure for the Performance Period and/or upon a comparison of such performance with the performance under such measure during a prior period or with the performance of a peer group of corporations
selected or defined by the Committee at the time of making a Performance Award. The Committee may in its discretion also determine to use other objective performance measures as Performance Criteria. 

  

	 	(s)	“Performance Period” means an accounting period of the Company or a subsidiary of not less than one year, as determined by the Committee in its discretion.

  

	 	(t)	“Person” shall have the meaning given in Section 3(a)(9) of the Exchange Act, as modified and used in Sections 13(d) and 14(d) thereof, except that such term shall
not include (i) the Company or any of its subsidiaries, (ii) a trustee or other fiduciary holding securities under an employee benefit plan of the Company or any of its Affiliates, (iii) an underwriter temporarily holding securities
pursuant to an offering of such securities, (iv) a corporation owned, directly or indirectly, by the shareholders of the Company in substantially the same proportions as their ownership of Stock of the Company or (v) any individual or
entity [including the trustees (in such capacity) of any such entity which is a trust] which is directly or indirectly, the Beneficial Owner of securities of the Company representing five percent (5%) or more of the combined voting power of the
Company’s then outstanding securities immediately before the Effective Date or any Affiliate of any such individual or entity, including, for purposes of this Section 18(t), any of the following: (A) any trust (including the trustees
thereof in such capacity) established by or for the benefit of any such individual; (B) any charitable foundation (whether a trust or a corporation, including the trustees or directors thereof in such capacity) established by any such
individual; (C) any spouse of any such individual; (D) the ancestors (and spouses) and lineal descendants (and spouses) of such individual and such spouse; (E) the brothers and sisters (whether by the whole or half blood or by
adoption) of either such individual or such spouse; or (F) the lineal descendants (and their spouses) of such brothers and sisters. 

  

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	 	(u)	“Restricted Stock” means Shares which have certain restrictions attached to the ownership thereof, which may be issued under Section 4.3. 

  

	 	(v)	“Retirement” means retirement under any retirement plan of the Company or a Participating Subsidiary. 

  

	 	(w)	“Share” means a share of Stock. 

  

	 	(x)	“Stock” means the Common Stock, without par value, of the Company, or, in the event that the outstanding Common Stock is hereafter changed into, or exchanged for,
different stock or securities, such other stock or securities. 

  

	 	(y)	“Stock Appreciation Right” means a right, the value of which is determined relative to the appreciation in value of Shares, which may be issued under Section 4.2.

  

	 	(z)	“Stock Option” means a right to purchase Shares granted pursuant to Section 4.1 and includes Incentive Stock Options and Non-Qualified Stock Options as defined in
Section 4.1 

  

 10CSG Systems International, Inc. Performance Bonus Program

 Exhibit 10.05 
 CSG SYSTEMS INTERNATIONAL, INC. 
 PERFORMANCE BONUS PROGRAM 
  

	1.	Purpose. 

 The purpose of the CSG Systems
International, Inc. Performance Bonus Program (the “Program”) is to provide for annual cash bonus awards (a “Bonus Award”) under the Program for (i) the persons designated as executive officers of CSG Systems International,
Inc. (the “Company”) by the Board of Directors of the Company and (ii) any other employee of the Company or its subsidiaries who is or may be a “covered employee” of the Company or its subsidiaries as defined in
Section 162(m)(3) of the Internal Revenue Code of 1986, as amended (the “Code”), that constitute performance-based compensation within the meaning of Section 162(m)(4)(C) of the Code and Treasury Regulations § 1.162-27. For
purposes of the Program, “Participant” means a person referred to in the first sentence of this Section 1. Bonus Awards under the Program shall be paid for services performed by a Participant during a calendar year. 
  

	2.	Administration. 

 (a) The Program shall be
administered by the Compensation Committee (the “Committee”) of the Company’s Board of Directors (the “Board”). No member of the Committee shall be eligible to participate in the Program. The Committee at all times shall be
comprised of two or more members who are “outside directors” for purposes of Section 162(m)(4)(C)(i) of the Code. 
 (b) The
Committee shall have the power and discretionary authority to adopt, amend, and rescind any rules, regulations, and procedures which the Committee deems necessary or appropriate for the operation and administration of the Program and to interpret
and rule on any questions relating to any provision of the Program. However, the Committee shall not take any action that would result in the payment of compensation under the Program to any Participant who is a “covered employee” as
defined in Section 162(m)(3) of the Code if such payment would not be “performance-based compensation” within the meaning of Section 162(m) of the Code, as reasonably determined by the Committee. 
 (c) The decisions of the Committee (including but not limited to decisions as to whether a Participant is entitled to payment of a Bonus Award in whole
or in part or not at all) shall be final, conclusive, and binding on all parties, including the Company and each Participant. 
 (d) The
Board from time to time may amend, suspend, or terminate the Program, in whole or in part; provided, that no payment which becomes due under the Program as a result of an amendment of the Program that requires stockholder approval to satisfy the
requirements of Section 162(m) of the Code shall be made until the Company has obtained such stockholder approval. 

	3.	Performance Goals. 

 (a) Not later than ninety
(90) days after the beginning of each calendar year, the Committee shall establish in writing (i) one or more Performance Goals (as defined in Section 3(c)) that must be attained in order for a Participant to receive a Bonus Award for
such calendar year and (ii) the method, in terms of an objective formula or standard, for computing the amount of the Bonus Award to be paid to a Participant if the applicable Performance Goals are attained. Subject to and consistent with the
provisions of the preceding sentence, the Committee shall determine the potential Bonus Award which a Participant shall be eligible to receive for a particular calendar year and may establish terms and conditions in addition to (but not in lieu of)
the attainment of Performance Goals that a Participant must satisfy in order to receive such Bonus Award. Actual and potential Bonus Awards and such additional terms and conditions need not be uniform among Participants. The Committee shall have the
discretion to revise the amount of a Bonus Award payable to a Participant upon the attainment of Performance Goals solely for the purpose of reducing the amount of or eliminating such Bonus Award. A Participant’s level of satisfaction of any
additional terms and conditions established by the Committee for such Participant’s receipt of a Bonus Award shall be relevant only for the purpose of potentially reducing the amount of or eliminating such Participant’s Bonus Award and may
not be used to increase such Participant’s Bonus Award beyond that which would be payable based solely upon the Company’s attainment of applicable Performance Goals. 
 (b) The maximum individual Bonus Award payable to a Participant for any calendar year shall be equal to 200% of the annual base salary of such
Participant as of the last day of such calendar year; provided, however, that in no event may a Participant’s maximum Bonus Award under the Program for any calendar year exceed $3,000,000 or such lesser amount as is established by the Committee
for such calendar year. 
 (c) A “Performance Goal” is an objective performance goal based entirely on one or more of the following
business criteria applicable to the Company: net income, adjusted net income, operating income, adjusted operating income, revenue, adjusted revenue, earnings, adjusted earnings, gross margin, return on stockholders’ equity, stock price,
earnings per share, adjusted earnings per share, and cash flow. Except as provided in Section 3(d), Performance Goals for a calendar year may not be changed once established by the Committee; however, the Committee retains discretion to reduce
or eliminate a Participant’s Bonus Award as provided in Section 3(a). Performance Goals may be particular to an individual Participant or to a subsidiary or other business unit of the Company or may be based upon the performance of the
Company and its subsidiaries as a whole. Performance Goals may vary from Participant to Participant and from calendar year to calendar year. 
 (d) If, after the Committee has established a Performance Goal for a particular calendar year, the Company or any of its subsidiaries (i) acquires or disposes of any assets, business division, subsidiary, or other business operations,
(ii) discontinues any business operations, or (iii) incurs any restructuring charge or any item of extraordinary loss or expense (each event in the preceding clauses (i), (ii), and (iii) being referred to as a “Subsequent
Event”) and such Subsequent Event has a materially positive or negative effect upon the attainment of such Performance Goal as originally established, then the Committee shall adjust such original 

  

 2 

 
Performance Goal so that such Performance Goal as adjusted is comparable to what such Performance Goal would have been had the Committee taken such
Subsequent Event into account when the Committee originally established such Performance Goal. 
 (e) Notwithstanding any other provision of
the Program, the Committee shall have the discretion to pay a Bonus Award to a Participant regardless of the attainment of a Performance Goal in the event of such Participant’s death or termination of employment on account of a long-term
disability as determined by the Committee. 
  

	4.	Communication. 

 The Committee promptly shall inform
each Participant in writing of the Performance Goals applicable to such Participant for a particular calendar year and (subject to the provisions of the Program) the terms and conditions of such Participant’s participation in the Program for
such calendar year. 
  

	5.	Certification. 

 Prior to the payment of any Bonus
Award, the Committee shall certify in writing that the applicable Performance Goals have been attained. No payment shall be made under the Program in the absence of such certification; however, the attainment or failure to attain Performance Goals
under the Program shall not preclude the payment of compensation, including discretionary payments, to a Participant under any other plan, program, agreement, or arrangement of the Company or its subsidiaries, whether now existing or established
after the adoption of the Program, on the basis of goals or criteria separate from the business criteria set forth in Section 3(c) or pursuant to the terms of such other plan, program, agreement, or arrangement. 
  

	6.	Payment of Bonus Awards. 

 The Company shall pay the
Bonus Awards for a calendar year in cash as soon as practicable after the certification of the attainment of the Performance Goals pursuant to Section 5 and the final determination of the amount of each Bonus Award to be paid; provided, that,
so long as such certification and determination have occurred, the Company shall pay the Bonus Awards for a calendar year not later than March 15 of the following calendar year; and provided further, that payment of part or all of any Bonus
Award shall be deferred by the Company in accordance with the terms of any separate deferred compensation agreement or arrangement applicable to a Participant. As a further condition of the payment of a Participant’s Bonus Award for a
particular calendar year, such Participant must be employed by the Company or its subsidiaries on the last day of such calendar year. The Committee may provide, as a further condition of the payment of a Participant’s Bonus Award for a
particular calendar year, that the Participant must be employed by the Company or its subsidiaries on the date of the Committee’s certification of the Company’s attainment of the Performance Goals for such calendar year or on any other
date subsequent to the last day of such calendar year. 
  

	7.	Effective Date of Program. 

 The Program shall be
effective January 1, 2007, subject to approval by the holders of a majority of the shares of common stock of the Company present or represented by proxy at the 

  

 3 

 
2007 annual meeting of stockholders of the Company. No payment shall be made under the Program unless the stockholders of the Company have approved the
Program as required by Section 162(m) of the Code and Treasury Regulations § 1.162-27 prior to such payment. The Program shall continue until terminated by the Board but shall be resubmitted to stockholders from time to time as required by
Section 162(m) of the Code and Treasury Regulations § 1.162-27. 
  

	8.	Miscellaneous. 

 (a) Participants in the Program are
unsecured general creditors of the Company, with no secured or preferential right to any assets of the Company or any other entity for payment of Bonus Awards under the Program. 
 (b) A Participant shall have no right to commute, sell, assign, transfer, pledge, anticipate, mortgage, or otherwise encumber, transfer, hypothecate, or
convey in advance of actual receipt the amounts, if any, payable to such Participant under the Program. No part of any amounts payable to a Participant under the Program shall, prior to actual payment, be subject to seizure or sequestration for the
payment of any debt, judgment, alimony, or separate maintenance owed by such Participant or any other person or be transferable by operation of law in the event of a Participant’s or any other person’s bankruptcy or insolvency. 

(c) The Program does not constitute a contract of employment between the Company or any of its subsidiaries and any Participant and does not entitle
any Participant to continued employment with the Company or any of its subsidiaries. 
 (d) The Company and its subsidiaries shall have the
right to deduct from all amounts payable to a Participant under the Program any taxes required by law or other amounts authorized by the Participant to be withheld from payments under the Program. 
 (e) The Company and its subsidiaries reserve the right from time to time to establish, implement, and modify compensation plans, programs, agreements,
and arrangements other than and in addition to the Program for persons who are Participants in the Program. 
 (f) The Program shall be
construed and interpreted according to the laws of the State of Delaware, except as preempted by federal law, and without regard to conflict of law principles. 
 (g) Notwithstanding anything in the Program to the contrary, the Program and Bonus Awards made under the Program are intended to comply with the requirements of Section 409A of the Code. If any Program provision
or Bonus Award made under the Program would result in the imposition of an additional tax on a Participant under Section 409A of the Code, then the Committee shall reform such Program provision or Bonus Award to avoid the imposition, to the
extent possible, of such tax; and no action so taken by the Committee to comply with the requirements of Section 409A of the Code shall be deemed to adversely affect a Participant’s rights with respect to a Bonus Award or to require the
consent of such Participant. The Committee, in the exercise of its sole discretion and without the consent of the Participant involved, may amend or modify a Bonus Award in any manner and delay the payment of any amounts payable pursuant to a Bonus
Award to the minimum extent necessary to comply with the requirements of Section 409A of the Code as the Committee deems necessary or appropriate. 
  

 4

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