UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): JULY 15, 2003 TC PIPELINES, LP (Exact name of registrant as specified in its charter) DELAWARE 000-26091 52-2135448 (State or other jurisdiction (Commission (I.R.S. Employer of incorporation) File Number) Identification No.) 110 TURNPIKE ROAD, SUITE 203 01581 WESTBOROUGH, MASSACHUSETTS (Zip Code) (Address of principal executive offices) (508) 871-7046 (Registrant's telephone number, including area code) ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS. (c) Exhibits. 99.1 Press Release issued by Northern Border Pipeline Company on July 15, 2003. ITEM 9. REGULATION FD DISCLOSURE On July 15, 2003, Northern Border Pipeline Company ("Northern Border Pipeline") issued a press release announcing that it has made further progress in recontracting and has now nearly sold out the long-haul firm capacity on its pipeline system. The additional capacity commitments are at the maximum transportation rates with terms of one to two years. In the same press release, Northern Border Pipeline also announced that Cargill, Incorporated ("Cargill") has finalized the assignment of all of the firm transportation capacity formerly held by Mirant Americas Energy Marketing, LP ("Mirant"), which is approximately 10% of Northern Border Pipeline's firm capacity and extends for terms into 2006 and 2008. Additionally, Cargill assumed the management services of Pan-Alberta Gas, Ltd. previously performed by Mirant. TC PipeLines, LP (the "Partnership") owns a 30% general partner interest in Northern Border Pipeline. A copy of the press release of Northern Border Pipeline is furnished as Exhibit 99.1. The information in Item 9 of this report is being furnished, not filed, pursuant to Regulation FD. Accordingly, the information in Item 9 of this report will not be incorporated by reference into any registration statement filed by the Partnership under the Securities Act of 1933, as amended, unless specifically identified therein as being incorporated therein by reference. The furnishing of the information in this report is not intended to, and does not, constitute a determination or admission by the Partnership, that the information in this report is material or complete, or that investors should consider this information before making an investment decision with respect to any security of the Partnership or any of its affiliates. -2- SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. TC PipeLines, LP By: TC PipeLines GP, Inc., its general partner Dated: July 15, 2003 By: /s/ Theresa Jang ---------------------------------------- Theresa Jang Controller -3- EXHIBIT INDEX NUMBER EXHIBIT 99.1. Press Release issued by Northern Border Pipeline Company on July 15, 2003. -4-