Document:

EX-4.2

 Exhibit 4.2 
 Amendment Number 1 
 to 

PCS U.S. Employees’ Savings Plan for Collectively Bargained Employees 

(Effective as of January 1, 2012) 
 WHEREAS, PCS Administration (USA), Inc. (the “Sponsor”) is the sponsor of the PCS U.S. Employees’ Savings Plan for Collectively Bargained Employees (the “Plan”), a
qualified defined contribution plan maintained pursuant to Section 401(a) of the Internal Revenue Code of 1986, as amended (the “Code”); 
 WHEREAS, effective as of the first full payroll period beginning after October 1, 2012, the Sponsor desires to amend the Plan to provide for an increase in basic contributions made on behalf
of certain employees of PCS Nitrogen Ohio, L.P. who are PCS production and maintenance employees at the Lima, Ohio plant represented by the United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers
International Union, Local 1-626; and 
 WHEREAS, pursuant to Article 14 of the Plan, the Sponsor may amend the Plan at
any time and has authorized its officers to execute this Amendment. 
 NOW THEREFORE BE IT RESOLVED, effective as of the
first full payroll period beginning after October 1, 2012, Section A.4(a) of Supplement A of the Plan is hereby amended as follows: 
  

	 	“(a)	In General. A Basic Contribution shall be made on behalf of each Eligible Employee, regardless of whether each Employee has elected to make Before-Tax
Contributions or After-Tax Contributions to the Plan as described in Article 4. Basic Contributions shall be contributed by the Employer to the Trustee each payroll period, and shall be equal to five percent (5%) of the Eligible Employee’s
base pay earned during such pay period. Effective as of the first full payroll period beginning after October 1, 2012, such Basic Contributions shall be equal to six percent (6%) of the Eligible Employee’s base pay earned during the
pay period.” 

*        *        * 

IN WITNESS WHEREOF, the Sponsor has caused this instrument to be executed on its behalf by its duly
authorized officer effective as of the 11th day of October
2012. 
  

			
	PCS Administration (USA), Inc.
		
	By:	 	 /s/ Lee M. Knafelc

		 	Lee M. Knafelc
		 	V.P. Administration & H.R.EX-4.3

 Exhibit 4.3 
 Amendment Number 2 
 to 

PCS U.S. Employees’ Savings Plan for Collectively Bargained Employees 

(Effective as of January 1, 2012) 
 WHEREAS, PCS Administration (USA), Inc. (the “Sponsor”) is the sponsor of the PCS U.S. Employees’ Savings Plan for Collectively Bargained Employees (the “Plan”), a
qualified defined contribution plan maintained pursuant to Section 401(a) of the Internal Revenue Code of 1986, as amended (the “Code”); 
 WHEREAS, the Sponsor desires to amend the Plan in connection with an application under the IRS’ Voluntary Correction Program to incorporate a three-year cliff vesting schedule for basic
contributions made on behalf of certain employees of PCS Nitrogen Ohio, L.P. who are PCS production and maintenance employees at the Lima, Ohio plant represented by the United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied
Industrial and Service Workers International Union, Local 1-626; and 
 WHEREAS, pursuant to Article 14 of the Plan, the
Sponsor may amend the Plan at any time and has authorized its officers to execute this Amendment. 
 NOW THEREFORE BE IT
RESOLVED, effective as of January 1, 2012, Supplement A, Section A.4 of the Plan is hereby amended as follows: 
  

	 	“A.4	Additional Employer Contributions 

 In addition to the Employer Matching Contributions and Employer Performance Contributions described in Sections 4.3 and 4.4 of the Plan, the Employer shall make an additional Basic Contribution on behalf
of qualifying Participants who are Eligible Employees under this Supplement, as further described below: 
  

	 	(a)	In General. A Basic Contribution shall be made on behalf of each Eligible Employee, regardless of whether each Employee has elected to make Before-Tax
Contributions or After-Tax Contributions to the Plan as described in Article 4. Basic Contributions shall be contributed by the Employer to the Trustee each payroll period, and shall be equal to five percent (5%) of the Eligible Employee’s
base pay earned during such pay period, Effective as of the first full payroll period beginning after October 1, 2012, such Basic Contributions shall be equal to six percent (6%) of the Eligible Employee’s base pay earned during the
pay period. 

  

	 	(b)	 Allocation. Amounts described in subsection (a) shall be held in the Participant’s Basic Contribution Account. Such account shall be
subject to the same distribution, loan, and withdrawal restrictions as apply to the Employer Matching Contributions Account. Notwithstanding the foregoing, in lieu of the vesting schedule described in Section 5.2(b) of the Plan, a Participant shall
become vested 

	 	
in the amount held in his Basic Contribution Account according to the following schedule: 

  

					
	 Years of Vesting Service
	  	Nonforfeitable Percentage	 
	 less than 1 year
	  	 	0	% 
	 1 year
	  	 	0	% 
	 2 years
	  	 	0	% 
	 3 years
	  	 	100	%” 

 *        *        *

 IN WITNESS WHEREOF, the Sponsor has caused this instrument to be executed on its behalf by its
duly authorized officer effective as of the 25th day of
June 2013. 
  

			
	PCS Administration (USA), Inc.
		
	By:	 	 /s/ Lee M. Knafelc

		 	Lee M. Knafelc
		 	V.P. Administration & H.R.

  
 2EX-4.4

 Exhibit 4.4 
 Amendment Number 3 
 to 

PCS U.S. Employees’ Savings Plan for Collectively Bargained Employees 

(As Amended and Restated Effective as of January 1, 2012) 
 WHEREAS, PCS Administration (USA), Inc, (“Sponsor”) is the sponsor of the PCS U.S. Employees’ Savings Plan for Collectively Bargained Employees (“Plan”), a qualified
defined contribution plan maintained pursuant to Section 401(a) of the Internal Revenue Code of 1986, as amended; 

WHEREAS, the Sponsor desires to amend the Plan in order to implement certain terms of the 2013 White Springs Agricultural
Chemicals, Inc. Involuntary Severance Pay Plan for Union Employees; and 
 WHEREAS, pursuant to Article 14 of the Plan,
the Sponsor may amend the Plan at any time and has authorized the undersigned officer to execute this Amendment. 
 NOW,
THEREFORE, BE IT RESOLVED, effective as of the execution date of this Amendment, the Plan is amended by adding the following new Supplement D to the Plan: 
 “Supplement D. 2013 White Springs Agricultural Chemicals, Inc. Involuntary Severance Pay Plan for Union Employees 
 D.1 Covered Participants. A participant in this Supplement (a “Supplement D Participant”) is a Plan Participant employed by White Springs Agricultural Chemicals, Inc. who (i) is
notified of his or her involuntary termination and eligibility to participate in the 2013 White Springs Agricultural Chemicals, Inc. Involuntary Severance Pay Plan for Union Employees (the “2013 Involuntary Severance Plan”); and
(ii) executes and does not later revoke a waiver and release agreement under the 2013 Involuntary Severance Plan. The determination of who is eligible to be a Supplement D Participant shall be made in the sole discretion of the Plan
Administrator. 
 D.2 Vesting. Any Supplement D Participant who is not 100% fully vested in his Plan Accounts will become
100% fully vested upon termination of employment. 
 D.3 Compensation. Any severance pay or additional compensation paid
to a Supplement D Participant under the 2013 Involuntary Severance Plan shall not be Compensation for the purpose of determining any type of contributions or benefits under the Plan. This Section shall not apply to any notice pay received by a
Supplement D Participant pursuant to the Worker Adjustment and Retraining Notification Act (WARN).” 

*        *        * 

[signature page to follow] 

 IN WITNESS WHEREOF, the Sponsor has caused this Amendment to be executed on its
behalf by its duly authorized officer effective as of the 2 day of December, 2013. 
  

			
	PCS Administration (USA), Inc.
		
	By:	 	 /s/ Lee Knafelc

		 	Lee Knafelc
		 	V.P., Human Resources & Administrator

  
 2EX-4.5

 Exhibit 4.5 
 Amendment Number 4 
 to 

PCS U.S. Employees’ Savings Plan for Collectively Bargained Employees 

(As Amended and Restated Effective as of January 1, 2012) 
 WHEREAS, PCS Administration (USA), Inc. (“Sponsor”) is the sponsor of the PCS U.S. Employees’ Savings Plan for Collectively Bargained Employees (“Plan”), a qualified
defined contribution plan maintained pursuant to Section 401(a) of the Internal Revenue Code of 1986, as amended; 

WHEREAS, the Sponsor desires to amend the Plan to (i) modify the Plan’s default beneficiary designation provisions in
the event no beneficiary designation is in effect at the time of a participant’s death, or no designated beneficiary survives the participant; (ii) clarify the maximum amount of combined catch-up contributions and before-tax contributions
a participant may make to the Plan for any given calendar year; (iii) clarify that rollover contributions will be taken into account when determining whether the small sum cashout threshold has been met and (iv) clarify that catch-up
contributions are an available Plan loan source with respect to eligible employees of White Springs Agricultural Chemicals, Inc.; and 
 WHEREAS, pursuant to Article 14 of the Plan, the Sponsor may amend the Plan at any time and has authorized the undersigned officer to execute this Amendment. 

NOW, THEREFORE, BE IT RESOLVED, effective as of January 1, 2013, the Plan is hereby amended as follows: 

 

	1.	Section 2.1(g) is amended in its entirety to read as follows: 

  

	 	“(g)	“Beneficiary” or “Beneficiaries” means the person, persons (who may be named contingently or successively), or entity designated by a
Participant to receive a Plan benefit in the event of the Participant’s death. Each Beneficiary designation will revoke all prior designations made by the Participant. A Beneficiary designation shall be made in the time and manner prescribed by
the Committee, and will be effective as soon as administratively practicable after such designation is filed with the Committee. Notwithstanding the foregoing, in the case of a married Participant, the Participant’s Spouse will automatically be
the Beneficiary unless (i) the Participant has designated another person as his Beneficiary; (ii) the Participant’s Spouse has consented in writing to the designation of the specific non-Spouse Beneficiary, including any class of
Beneficiaries or any contingent Beneficiaries; (iii) the Participant’s Spouse acknowledges the effect of such election and (iv) the Spouse’s consent is witnessed by a notary public or an authorized representative of the Plan.

 Notwithstanding the foregoing, the Spouse’s consent is not required if the Spouse cannot be located or if
the Participant furnishes the Committee a court order decreeing that the Participant and the Spouse are legally separated or that the Spouse has abandoned the Participant. In addition, if a Participant’s Spouse is designated as the
Participant’s Beneficiary and the Participant and Spouse 

 
divorce, the designation will be automatically revoked, and the former Spouse will have no further rights as a Beneficiary (except as otherwise provided by a qualified domestic relations order
under Code Section 414(p)), unless the Participant completes a new Beneficiary designation identifying the former Spouse as the Beneficiary. 
 If no Beneficiary designation is in effect at the time of the Participant’s death, or if no designated Beneficiary survives the Participant, payment of the Participant’s Account will be made in
the following order: 
  

	 	(1)	to the Participant’s living Spouse; 

  

	 	(2)	if the Participant has no living Spouse, then to his living children (in equal shares); 

 

	 	(3)	if the Participant has no living children, then to his living parents (in equal shares); 

 

	 	(4)	if the Participant has no living parents, then to his living brothers and sisters (in equal shares); or 

 

	 	(5)	if the Participant has no living brothers or sisters, then to his estate. 

 The Committee will, in its sole and absolute discretion, determine the right of such persons to receive the Participant’s Plan Account, if any. If the Committee is in doubt as to the right of any
person to receive such amount, the Committee may direct the Trustee to retain such amount, without liability for any interest on such amount, until the rights to such amount are determined, or, alternatively, may direct the Trustee to pay such
amount into any court of appropriate jurisdiction and such payment will be a complete discharge of the liability of the Plan and the Trust. 
 Any Beneficiary designation made by a Participant who participated in the A&W Plan before the “closing date” (as defined in that plan) shall continue in effect as though such beneficiary
designation had been made under the Plan, unless and until a new Beneficiary designation is made by such Participant.” 
  

	2.	Section 4.1(d) is amended in its entirety to read as follows: 

  

	 	“(d)	 Catch-Up Contributions. Notwithstanding anything in the Plan to the contrary, a Participant who (i) will attain age 50 before the close of
a given Plan Year; and (ii) with respect to whom no other Before-Tax Contributions (without regard to this paragraph (d)) may be made to the Plan for such Plan Year by reason of the application of any limitation or other restriction described
in the federal income tax laws or the terms of the Plan may elect to make additional Catch-Up Contributions in increments of one percent (1%) of Compensation in accordance with, and subject to the limitations of, Code Section 414(v) (e.g.,
up to $5,500 for 2013 and 2014, and thereafter adjusted under the Code and by the Secretary of the 

  
 2 

	 	
Treasury for cost-of-living increases). Notwithstanding the foregoing, such Catch-Up Contributions, when combined with a Participant’s Before-Tax Contributions under paragraph
(a) above, may not exceed seventy-five percent (75%) of the Participant’s Compensation for any given Plan Year. 

 A Participant’s Catch-Up Contribution election will be effective on the first day of the first payroll period, or as soon as administratively practicable thereafter, after the election is received by
the Committee, and will remain in effect for so long as the Participant is eligible to make Before-Tax Contributions or, if earlier, the date the Participant modifies his Catch-Up Contribution election. Catch-Up Contributions will be credited to the
Participant’s Catch-Up Contributions Account. Such Catch-Up Contributions will not be taken into account for purposes of the provisions of the Plan implementing the required limitations of Code Sections 402(g) and 415. In addition, the Plan
will not be treated as failing to satisfy the provisions of the Plan implementing the requirements of Code Sections 401(k)(3), 410(b) and 416, as applicable, by reason of such Catch-Up Contributions being made. Catch-Up Contributions will be subject
to the same in-service withdrawal rules that apply to Before-Tax Contributions under Sections 9.1(b) and 9.2(b). Notwithstanding anything in the Plan to the contrary, the Employer will not make any Employer Matching Contributions under
Section 4.3 with respect to a Participant’s Catch-Up Contributions.” 
  

	3.	Section 8.2(b) is amended in its entirety to read as follows: 

  

	 	“(b)	Small Amounts. Notwithstanding any provision of the Plan to the contrary, if the value of the Participant’s Accounts is $1,000 or less, a lump sum payment
shall automatically be made as soon as administratively practicable following the Participant’s termination of employment.” 

  

	4.	Appendix F is amended by revising Section F.4 in its entirety to read as follows: 

 “F.4 Source of Loan Funds and Valuation. The amount needed to provide the principal amount of the loan shall come from a liquidation of the Funds. The amounts held in the Employees’
Before-Tax Contributions Account, Catch-Up Contributions Account, Employer Matching Contributions Account (to the extent vested), Rollover Account, Employer Performance Contributions Account and After-Tax Contributions Account, shall be liquidated
pro rata from such Funds, in accordance with rules promulgated by the Committee. Account balances liquidated from all Funds will be valued at the closing value for the date on which the loan is processed.” 

*        *        * 

[signature page follows] 

  
 3 

 IN WITNESS WHEREOF, the Sponsor has caused this Amendment
to be executed on its behalf by its duly authorized officer effective as of the 23rd day of December, 2013. 
  

			
	PCS Administration (USA), Inc.
		
	By:	 	 /s/ Lee Knafelc

		 	Lee Knafelc
		 	V.P., Human Resources & Administration

  
 4

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