SB 715 amends Texas Utilities Code Section 39.1592(a) to apply reliability requirements to all electric generators in the ERCOT region, not just new ones, and advances the compliance deadline from January 2028 to January 2027. The bill creates a uniform standard that addresses the volatility costs of existing generation ($788M in 2023) and ensures faster reliability improvements as Texas faces growing electricity demand. All generators operational for at least one year must comply with PUC-established standards.