TX HB5224

Creates a new "seasonal critical customer" designation for natural gas facilities already designated as critical customers, allowing them to maintain critical infrastructure status only during specific seasons rather than year-round

Requires the Railroad Commission of Texas to establish standards for determining which seasons qualify for seasonal critical customer designation, including specific beginning and end dates for each season

Establishes an application process for facility owners and operators to request seasonal critical customer designation, which can be combined with their critical infrastructure designation application

Mandates the Railroad Commission to annually provide a list of seasonal critical customer facilities to the Public Utility Commission of Texas, which must then share the list with ERCOT

Requires the Public Utility Commission to adopt rules by February 1, 2026, allowing ERCOT to competitively procure demand reductions from seasonal critical customer facilities during their designated seasons

Sets implementation deadlines: Railroad Commission must adopt rules by February 1, 2026, provide initial facility list by March 31, 2026, and PUC must forward the list to ERCOT by April 30, 2026