EXHIBIT 10.13 FIRST AMENDMENT TO TEXAS GENCO OPTION AGREEMENT This First Amendment to Texas Genco Option Agreement (this "Amendment"), entered into this 21st day of February, 2003, but effective as of December 31, 2000, between CenterPoint Energy,...Texas Genco Option Agreement • March 12th, 2003 • Texas Genco Holdings Inc • Electric services
1 EXHIBIT 10.4 TEXAS GENCO OPTION AGREEMENTTexas Genco Option Agreement • May 14th, 2001 • Reliant Energy Resources Corp • Electric services • Texas
