<PAGE 1> UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549-1004 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number 1-14768 BEC ENERGY * (Exact name of registrant as specified in its charter) 800 Boylston Street, Boston, Massachusetts 02199 1-888-423-2364 (Address, including zip code, and telephone number, including area code, of registrant's principal executive offices) Common Stock, par value $1 per share (Title of each class of securities covered by this Form) None (Titles of all other classes of securities for which a duty to file reports under section 13(a) or 15(d) remains) Please place an X in the box(es) to designate the appropriate rule provision(s) relied upon to terminate or suspend the duty to file reports: Rule 12g-4(a)(1)(i) [ X ] Rule 12h-3(b)(1)(i) [ X ] Rule 12g-4(a)(1)(ii) [ ] Rule 12h-3(b)(1)(ii) [ ] Rule 12g-4(a)(2)(i) [ ] Rule 12h-3(b)(2)(i) [ ] Rule 12g-4(a)(2)(ii) [ ] Rule 12h-3(b)(2)(ii) [ ] Rule 15d-6 [ ] Approximate number of holders of record as of the certification or notice date: 1 Pursuant to the requirements of the Securities Exchange Act of 1934, NSTAR, as successor by merger to BEC Energy, has caused this certification/notice to be signed on its behalf by the undersigned duly authorized person. Date: October 1, 1999 By: R. J. WEAFER, JR. Robert J. Weafer, Jr. Vice President & Controller * Effective August 25, 1999, pursuant to the Agreement and Plan of Merger dated as of December 5, 1998 and restated as of May 4, 1999 (the Agreement and Plan of Merger), among BEC Energy, Commonwealth Energy System (COM/Energy), NSTAR and two acquisition subsidiaries of NSTAR, BEC Energy and COM/Energy combined their businesses by merging with acquisition subsidiaries of NSTAR.