Document:

Exhibit

Exhibit 4.3
GUARANTEE
This GUARANTEE of Southern Company Gas, a Georgia corporation (the “Guarantor”), is dated as of ___________, 20___.
The Guarantor, for value received, hereby unconditionally guarantees to each Holder of a Series 2017A 4.400% Senior Note due May 30, 2047 (a “Note”) of Southern Company Gas Capital Corporation, a Nevada corporation (the “Company”), authenticated and delivered by the Trustee pursuant to the terms of an Indenture by and among the Company, the Trustee and the Guarantor dated as of February 20, 2001 (such Indenture as originally executed and delivered and as supplemented or modified, together with any constituent instruments establishing the terms of particular Securities, being herein called the “Indenture”), and to the trustee on behalf of each such Holder, the due and punctual payment of the principal of (and premium, if any) and interest, on each such Note, each as provided for pursuant to the terms of such Note when and as the same shall become due and payable, in accordance with the terms of such Note and of the Indenture under which it was issued. In case of the failure of the Company to make any such payment of principal (or premium, if any) or interest, the Guarantor hereby agrees to cause any such payment to be made when and as the same shall become due and payable by acceleration, call for redemption or otherwise, as if such payment were made by the Company.
The Guarantor hereby agrees that its obligations hereunder shall be unconditional, irrespective of the validity, regularity or enforceability of such Note or the Indenture, the absence of any action to enforce the same, any waiver or consent by the Holder of such Note or by the Trustee with respect to any provisions thereof or of the Indenture, the obtaining of any judgment against the Company or any action to enforce the same or any other circumstances which might otherwise constitute a legal or equitable discharge or defense of a guarantor. The Guarantor hereby waives the benefits of division and discussion, diligence, presentment, demand of payment, filing of claims with a court in the event of insolvency or bankruptcy of the Company, any right to require a proceeding first against the Company, protest or notice with respect to such Note or the indebtedness evidenced thereby and all demands whatsoever, and covenants that this Guarantee will not be discharged except by complete performance of the obligations contained in the Note and in the Guarantee. The Guarantee is a guarantee of payment and not of collection. If the Trustee or the Holder of any Note is required by any court or otherwise to return to the Company or the Guarantor, or any custodian, receiver, liquidator, trustee, sequestrator or other similar official acting in relation to the Company or the Guarantor, any amount paid to the Trustee or such Holder in respect of a Note, this Guarantee, to the extent theretofore discharged, shall be reinstated in full force and effect.
The Guarantor shall be subrogated to all rights of the Holders of a Note in respect of any amounts paid by the Guarantor on account of such Note pursuant to the provisions of this Guarantee or the Indenture; provided, however, that the Guarantor shall not be entitled to enforce or to receive any payments arising out of, or based upon, such right of subrogation until the principal of (and premium, if any) and interest, on the Note shall have been paid in full.
Capitalized terms used herein have the same meanings given in the Indenture unless otherwise indicated. This Guarantee shall be governed by and construed in accordance with the law of the State of New York.

This Guarantee is executed as of the day and year first above written.

	
					
	 
	 
	 
	SOUTHERN COMPANY GAS

	 
	 
	 
	By:
	 

	 
	 
	 
	Name:
Title:
	 

2

	
					
	Attest:
	 
	 
	 

	 
	 
	 
	 
	 

	By:
	 
	 
	 
	 

	Name:
Title:
	 
	 
	 
	 

	 
	 
	 
	 
	 

	 
	 
	 
	 
	 

3EX-10.1

 Exhibit 10.1 

[LAST NAME] 
 AMENDMENT
TO EMPLOYMENT AGREEMENT 
 Dear [NAME]: 

This Amendment to Employment Agreement (this “Amendment”) is entered into by and between [Sierra Oncology Canada ULC,
a British Columbia unlimited liability company formerly known as ProNAi Therapeutics Canada ULC]1 [Sierra Oncology, Inc., a Delaware corporation formerly known as ProNAi Therapeutics, Inc.]2 (the “Company”) and [NAME] (the “Employee”), as of the date both parties sign this Amendment. 

W I T N E S S E T H 

WHEREAS, the Company and the Employee are party to that certain Employment Agreement dated [DATE], (the “Employment
Agreement”) and attached hereto as Exhibit A. 
 WHEREAS, it is the intention of the Company and Employee to continue
the Employment Agreement except for the specific amendments enumerated below, which amendments are intended to, among other things, increase the Severance Period (as defined in the Employment Agreement). 

NOW, THEREFORE, in consideration of the mutual promises herein contained, it is hereby agreed as follows: 

1.    Amendments to Employment Agreement. 
  

	 	(a)	Section [5(b)(i)]1 [7(a)(i)]2 [8(a)(i)]3 of your
Employment Agreement is hereby replaced in its entirety by the following: 

 “severance pay in the form of continuation of
your base salary (the “Base Salary”) in effect as of the employment termination date for twelve (12) months (the “Severance Period”), subject to required payroll deductions and withholdings and
paid on the Company’s normal payroll schedule [(provided that if you are not subject to United States taxation on any of the Severance Benefits, the Company may provide the severance pay in a lump sum payment in lieu of salary
continuation, at its sole discretion)]1; provided, however, that if your employment termination date occurs within the twelve (12)-month period following the consummation of a Change of Control:
(A) your annual Base Salary for purposes of this Section [5(b)(i)]1 [7(a)(i)]2
[8(a)(i)]3 shall be deemed to be the sum of (x) your Base Salary in effect as of your employment termination date and (y) the average of your actual Performance Bonuses paid for the two
(2) most recently-completed fiscal years prior to the date of your termination of employment (or: (I) if you have been employed for only the most recently completed fiscal year, the Performance Bonus paid for the most recently-completed
fiscal year or (II) if you have not been employed throughout the most-recently completed fiscal year and through the Performance Bonus payment date with respect to such fiscal year, your target Performance Bonus for the year in which your date
of termination occurs) and (B) the length of the Severance Period shall be increased based on your years of service completed with the Company to be the 

 

	1 	For Canadian employees. 

	2 	For U.S. employees. 

	3 	 For Dr. Klencke. 

 
Severance Period set forth in the table below: 
  

					
	 Years of Completed Service
	  	Length of Severance Period in
months	 
	 0
	  	 	13.5	 
	 1
	  	 	14.4	 
	 2
	  	 	15.3	 
	 3
	  	 	16.2	 
	 4
	  	 	17.1	 
	 5 or more years
	  	 	18	 

  

	 	(b)	Section [5(b)(ii)]1 [7(a)(ii)]2 [8(a)(ii)]3 of your
Employment Agreement is hereby replaced in its entirety by the following: 

 “cash consideration in the form of monthly
payments in the amount equal to your monthly cost to maintain your personal health benefit plan coverage at the same level in effect as of your employment termination date (including dependent coverage, if elected prior to your employment
termination) through the earlier of the end of the Severance Period or the date that you become eligible for group health insurance coverage through a new employer, with any such cash payments to be subject to applicable deductions and withholdings.
You agree to provide prompt written notice to the Company if you become eligible for group health insurance coverage through a new employer during the Severance Period. 

The severance described in Sections [5(b)(i) and (ii)]1 [7(a)(i)and (ii)]2 [8(a)(i)and (ii)]3 shall be paid on or commencing no later than the first business day following the sixtieth (60th) day following your termination of employment and in compliance with the timeframe required under Section 409A as set forth herein, and the first payment will include the payments due and owing
prior to that payment date but for the application of this sentence. If the Straddle Period (as defined below) spans two (2) calendar years, then payments under Section [5(b)(i) and (ii)]1
[7(a)(i)and (ii)]2 [8(a)(i)and (ii)]3 will first be made on the first business day in the second calendar year that occurs after the expiration
of the sixty (60)-day period in which the release must be delivered and effective, as described in Section [7]1 [9]2 [10]3. The “Straddle Period” shall mean the sixty (60)-day period following a
termination of employment in which the release is to be executed and become irrevocable pursuant to Section [7]1 [9]2 [10]3 hereof.” 
 2.    Entire Agreement. The Employment Agreement, as amended
by this Amendment, sets forth the entire agreement and understanding of the parties relating to the subject matter herein and merges all prior discussions between them. No modification of or amendment to the Employment Agreement or this Amendment,
nor any waiver of any rights thereunder, shall be effective unless in writing signed by the parties to the Employment Agreement. 
  

 

	1 	For Canadian employees. 

	2 	For U.S. employees. 

	3 	For Dr. Klencke. 

 3.    No Other Changes to Employment Agreement. Except as expressly modified herein,
all other provisions of the Employment Agreement remain in full force and effect, except that on or after the date of this Amendment all references in the Employment Agreement to “this Agreement,” “hereto,” “hereof,”
“hereunder,” or words of like import shall mean the Employment Agreement as amended by this Amendment. 
 4.    [At Will
Employment. Nothing in this Amendment alters the at-will nature of Employee’s employment. Either Employee or the Company may terminate Employee’s employment at any time with or without notice or
reason.]1 
 5.    Governing Law. This Amendment shall be subject to the
same Governing Law provision as is set forth in your Employment Agreement. 
  

	1 	For U.S. employees. 

 IN WITNESS WHEREOF, this Amendment to Employment Agreement has been duly executed by the
parties hereto this      day of April 2017. 
  

							
	COMPANY:	 		 	
				
	By:	 	  
	 		 	Date:                                     
    
	Name:	 	Nick Glover	 		 	
	Title:	 	President and Chief Executive Officer	 		 	

 IN WITNESS WHEREOF, this Amendment to Employment Agreement has been duly executed by the
parties hereto this      day of April, 2017. 
 I have read and understood this Amendment and hereby acknowledge, accept and agree to
the terms as set forth above and further acknowledge that no other commitments were made to me relating to the subject matter hereof except as specifically set forth herein. 
  

			
	EMPLOYEE:
		
	By:	 	  

	Name:	 	[NAME]

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