Document:

AMENDMENT
      AND REVISION TO 

    DEVELOPMENT
      AND EXPLORATION AGREEMENT

    (Wardlaw
      Property, Edwards County, Texas)

    

    

    Effective
      March 31, 2006, Lothian
      Oil Inc.
      (“Lothian”), whose address is 500 Fifth Avenue, Suite 2600, New York, NY 10110,
      and UHC
      Petroleum Corporation,
      and
UHC
      Petroleum Services Corporation,
      as
      ratified by United
      Heritage Corporation (collectively
      referred to as “UHC”), whose address is 405 N. Marienfeld, Suite 200, Midland,
      TX 79701, entered into a Development and Exploration Agreement (the “Agreement”)
      providing for Lothian to loan UHC a sum of up to Two Million Five Hundred
      Thousand Dollars ($2,500,000.00) for the development of oil and gas leases
      owned
      by UHC in the Wardlaw Field in Edwards County, Texas (the “Wardlaw
      Property”).

    

    A
      copy of
      that Development and Exploration Agreement is attached to this Amendment as
      Exhibit “A.”

    

    After
      entering into the Agreement and the Promissory Note, Deed of Trust, Mortgage,
      Assignment of Production, Security Agreement and Financing Statement, and Credit
      Agreement provided for in that Agreement (the “Loan Documents”), it was realized
      that the Agreement erroneously provided, as part consideration for the loan,
      for
      UHC to deliver Lothian an assignment of a part of UHC’s interest in the Wardlaw
      Property, with the assignment to become effective when the full amount of the
      loan, together with all accrued interest had been paid in full to Lothian,
      as
      provided for in the Loan Documents.

    

    It
      was
      the intent of Lothian and UHC that the transaction provided for in the Agreement
      and Loan Documents only be a LOAN
      TRANSACTION AND NOT A TRANSFER OF INTEREST BY UHC TO
      LOTHIAN.
      By
      resolution adopted by the Board of Directors of UHC on May _____, 2006, it
      was
      acknowledged that the reference to an assignment by UHC to Lothian of a part
      of
      its interest in the Wardlaw Property was an error, and UHC is not obligated
      to
      assign any interest in the Wardlaw Property, which it owns, to Lothian, under
      the terms of the Agreement and Loan Documents.

    

    To
      evidence the agreement and understanding concerning the advances to be made
      by
      Lothian to UHC under the terms of the Agreement and Loan Documents, the
      Agreement and Loan Documents are hereby amended to delete any and all references
      in the Agreement and Loan Documents providing for UHC to deliver to Lothian
      an
      assignment of any interest in the Wardlaw Property. 

    

    Both
      UHC
      and Lothian acknowledge that if the proceeds of production from the Wardlaw
      Property pledged to Lothian in the Loan Documents are not adequate to pay the
      indebtedness and retire it in the manner provided for in the Loan Documents,
      UHC
      will repay the balance of any sums remaining due out of any other revenue
      sources available to UHC, and will not be obligated to assign any of its
      interest in the Wardlaw Property to Lothian.

    

    
      
        
        

      

      
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          2

        
          

        

      

      
        
        

      

    

    This
      Amendment is executed on behalf of Lothian and UHC to clarify that the
      transaction provided for in the Agreement is a loan and not a transfer of
      interest. UHC and Lothian agree to execute all further amendments to any
      agreements and documents they have entered into, which may be required, deemed
      advisable, or requested by either Lothian or UHC, to clarify that the
      transaction between the parties is a loan transaction, and shall under no
      circumstances be deemed a transfer of interest by UHC to Lothian in any of
      its
      properties.

    

    For
      all
      purposes, this Amendment to the Agreement and Loan Documents shall be deemed
      effective as of March 31, 2006, the Effective Date of the original Agreement
      and
      Loan Documents.

     

    
      	 	 	 
	
               “Lothian”

            	 
	 
 	 
 	 
 
	 	Lothian Oil
              Inc.
	 	 	 
	 	By:  	/s/
              Ken
              Levy
	 	
              

            
	Date:
              April ___,
              2006 	
                  
                Ken Levy, President

            

    

     

    
      	 	 	 
	
               “UHC”  
                   

            	 
	 	 	 
	 	UHC Petroleum
              Corporation
	 
 	 
 	 
 
	 	By:  	/s/ C.
              Scott
              Wilson
	 	
              

            
	Date:
              April ___,
              2006  	    
              C. Scott Wilson 
                  
                Chief Financial Officer

            

    

     

    
      	 	 	 
	 	United
              Heritage Corporation
	 
 	 
 	 
 
	 	By:  	/s/ C.
              Scott
              Wilson
	 	
              

            
	Date:
              April ___,
              2006 	    
              C. Scott Wilson
                  
                Chief Financial Officer

            

    

     

    
      	 	 	 
	 	UHC
              Petroleum Services Corporation
	 
 	 
 	 
 
	 	By:  	/s/ C.
              Scott
              Wilson
	 	
              

            
	Date:
              April ___,
              2006  	    
              C. Scott Wilson 
                  
                Chief Financial Officer

            

    

     

    
      
        
        

      

      
        Page
          1of
          2AMENDMENT
      TO TERM NOTE, SECURED CREDIT AGREEMENT, 

    AND
      DEED OF TRUST, MORTGAGE, ASSIGNMENT OF PRODUCTION,

    SECURITY
      AGREEMENT AND FINANCING STATEMENT

     

    On
      October 7, 2005, Lothian
      Oil Inc.
      (“Lothian”) entered into a Development and Exploration Agreement with
UHC
      New Mexico Corporation,
      UHC
      Petroleum Corporation,
      and
UHC
      Petroleum Services Corporation,
      ratified by United
      Heritage Corp.
      (collectively referred to in this Agreement as “UHCP”), providing for Lothian to
      advance up to Four Million Dollars ($4,000,000.00) for the development of the
      Cato San Andres Unit properties owned by UHCP in Chavez County, New
      Mexico.

    

    As
      evidence of this Agreement to advance funds, UHC New Mexico Corporation and
      United Heritage Corp. (as “Borrower”) executed a Term Note; Secured Credit
      Agreement; and Deed of Trust, Mortgage, Assignment of Production, Security
      Agreement and Financing Statement, providing for Lothian to advance to UHC
      New
      Mexico Corporation and United Heritage Corp., up to Four Million Dollars
      ($4,000,000.00) for the development of the Cato San Andres Unit Property, as
      provided for in the Development and Exploration Agreement.

    

    The
      Note,
      Secured Credit Agreement, and Deed of Trust provide for a ten (10) year term,
      with payments of all sums advanced by Lothian to UHCP, to be repaid at the
      end
      of the term. 

    

    This
      provision concerning the manner of repayment of advances under the Term Note
      made by Lothian to UHCP is not in conformity with the terms of the Development
      and Exploration Agreement.

    

    By
      execution of this Amendment to the Term Note, Secured Credit Agreement, and
      Deed
      of Trust, UHCP and Lothian desire to amend the Term Note, Secured Credit
      Agreement, and Deed of Trust so that they comply with the terms and provisions
      of the Development and Exploration Agreement entered into by Lothian and
      UHCP.

    

    For
      the
      consideration provided for in the Development and Exploration Agreement, Lothian
      and UHCP hereby amend the Term Note, Secured Credit Agreement, and Deed of
      Trust, to provided that the repayment of sums advanced under the Term Note,
      by
      Lothian, to UHCP, shall be repayable monthly, from seventy percent (70%) of
      UHCP’s shares of the oil and gas proceeds from the Cato San Andres Unit, with
      interest payable monthly at Citibank’s prime lending rate of interest plus
      1%.

    

    The
      Term
      Note, Secured Credit Agreement, and Deed of Trust shall be deemed amended and
      revised in the manner set forth above, to comport with the repayment terms,
      as
      provided for in the Development and Exploration Agreement.

    

    In
      all
      other respects, the Term Note, Secured Credit Agreement, and Deed of Trust,
      are
      unchanged.

     

    
      
         

      

      
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    This
      Amendment to the Term Note, Secured Credit Agreement, and Deed of Trust is
      executed as of the date set opposite Lothian’s and UHCP’s names, but shall be
      deemed effective for all purposes as of October 7, 2005.

    

    

      
        	 	
                “Lothian”

              
	 	 
	 	
                Lothian
                  Oil Inc.

              
	 	 
	 	
                By:
                  /s/
                  Kenneth Levy

              
	 	
                Ken
                  Levy

              
	Date:
                April 4,
                2006	
                President

              
	 	 
	 	
                “UHCP”

              
	 	 
	 	
                UHC
                  New Mexico Corporation

              
	 	 
	 	
                By:
                  /s/
                  C. Scott Wilson

              
	 	
                C.
                  Scott Wilson

              
	Date:
                April 4,
                2006	
                President,
                  CEO

              
	 	 
	 	 
	 	
                UHC
                  Petroleum Corporation

              
	 	
                 

              
	 	
                By:
                  /s/
                  C. Scott Wilson

              
	 	
                C.
                  Scott Wilson

              
	Date:
                April 4,
                2006	
                President,
                  CEO

              
	 	 
	 	 
	 	
                United
                  Heritage Corp.

              
	 	 
	 	
                By:
                  /s/
                  C. Scott Wilson

              
	 	
                C.
                  Scott Wilson

              
	Date:
                April 4,
                2006	
                President,
                  CEO

              
	 	 
	 	 
	 	
                UHC
                  Petroleum Services Corporation

              
	 	 
	 	
                By:
                  /s/
                  C. Scott Wilson

              
	 	
                C.
                  Scott Wilson

              
	Date:
                April 4,
                2006	
                President,
                  CEO

              

      

    

     

    
      
         

      

      
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