1 Exhibit 4.3 State of Delaware PAGE 1 Office of the Secretary of State -------------------------------- I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF FORMATION OF "PP&L MONTANA, LLC", FILED IN THIS OFFICE ON THE TWENTY-NINTH DAY OF DECEMBER, A.D. 1998, AT 4:30 O'CLOCK P.M. [SEAL] /s/ Edward J. Freel -------------------------------------- Edward J. Freel, Secretary of State 2986003 8100 AUTHENTICATION: 0709070 001494055 DATE: 09-29-00 2 STATE OF DELAWARE SECRETARY OF STATE DIVISION OF CORPORATIONS FILED 04:30 PM 12/29/1998 981506620 - 2986003 CERTIFICATE OF FORMATION OF PP&L MONTANA, LLC 1. The name of the limited liability company is PP&L Montana, LLC. 2. The address of its registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, County of New Castle. The name of its registered agent at such address is The Corporation Trust Company. IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation of PP&L Montana, LLC, this Twenty-Third day of December, 1998. /s/ Robert W. Burke, Jr. -------------------------------- Robert W. Burke, Jr. Authorized Person 3 State of Delaware PAGE 1 Office of the Secretary of State -------------------------------- I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF AMENDMENT OF "PP&L MONTANA, LLC", CHANGING ITS NAME FROM "PP&L MONTANA, LLC" TO "PPL MONTANA, LLC", FILED IN THIS OFFICE ON THE FOURTEENTH DAY OF FEBRUARY, A.D. 2000, AT 8:30 O'CLOCK A.M. [SEAL] /s/ Edward J. Freel -------------------------------------- Edward J. Freel, Secretary of State 2986003 8100 AUTHENTICATION: 0736878 001519937 DATE: 10-16-00 4 STATE OF DELAWARE SECRETARY OF STATE DIVISION OF CORPORATIONS FILED 08:30 AM 02/24/2000 001072697 - 2986003 CERTIFICATE OF AMENDMENT OF PP&L MONTANA, LLC 1. The name of the limited liability company is PP&L Montana, LLC. 2. The Certificate of Formation of the limited liability company hereby is amended as follows: The name of the limited liability company is PPL Montana, LLC. 3. This Certificate of Amendment shall be effective upon its filing with the Office of the Secretary of State of the State of Delaware. IN WITNESS WHEREOF, the undersigned has executed this Certificate of Amendment of the Certificate of Formation of PP&L Montana, LLC this 3rd day of February, 2000. PP&L MONTANA, LLC By: PP&L MONTANA HOLDINGS, LLC Sole Member By: /s/ Roger L. Petersen --------------------- Name: Roger L. Petersen Title: President and Chief Executive Officer