Articles · Power and data centers
The rule never says data center.
A proposed Texas grid service would buy demand reductions from large electricity users. Its definition turns on a site's power demand, not whether it is called a data center.
Read the story
The Public Utility Commission's proposed Large Load Demand Management Service addresses a problem larger than a single industry. It would require ERCOT to procure demand reductions from qualifying electricity users when an emergency is anticipated.
The published proposal does not use the words data center. It defines a large load customer by total non-coincident peak demand at a single site. That definition determines the proposed service's reach.
What the proposal would do
ERCOT would competitively procure demand reductions under an annual budget limit. The proposal also calls for a protocol allowing transmission-voltage customers to be curtailed during firm load shedding. A proposed service is not yet an adopted operating rule.
The distinction matters for reading the docket. The proposal is about demand management. The presence of data center companies among the filers does not rewrite the published customer definition.
A filing list is not a position summary
The Interchange index identifies parties, filing dates and short descriptions. It includes companies, individuals and a university-affiliated filer. Those entries establish that documents were submitted, not everything their authors argued.
The proposal directs electronic comments through the commission's interchange and requires the project number. Its notice sets the comment deadline at September 4th, 2026. That was the participation window as published for this edition.
What remains open
The final rule would establish which proposed requirements survive the comment process. Until adoption is verified, the definition, budget and curtailment provisions should be read as proposed terms.
Sources for this story
- Texas Register, August 14th, 2026, Proposed Rules, 16 TAC Economic Regulation
- PUCT Interchange, filing index for control number 58482
Claim-by-claim verification · 23 claims
The Public Utility Commission of Texas has proposed a new rule numbered 16 TAC Section 25.521 relating to Large Load Demand Management Service.
The Public Utility Commission of Texas (commission) proposes new §25.521 relating to Large Load Demand Management Service.
Comments on the proposed rule must be filed by September 4th, 2026.
Comments must be filed by September 4, 2026.
The commission directs that every comment refer to Project Number 58482.
All comments should refer to Project Number 58482.
The proposal states that interested persons may file comments electronically through the interchange on the commission's website.
Interested persons may file comments electronically through the interchange on the commission's website
The proposed rule would require ERCOT to develop a Large Load Demand Management Service to competitively procure demand reductions from large load customers.
ERCOT must develop a Large Load Demand Management Service (LLDMS) to competitively procure demand reductions from large load customers consistent with this section.
The proposed rule defines a large load customer as an entity with a total non-coincident peak demand at a single site equal to or greater than 75 megawatts.
An entity with a total non-coincident peak demand at a single site that is equal to or greater than 75 megawatts (MW).
The Interchange filing index for control number 58482 carries the case style Large Load Demand Management Service and stands at 34 filings.
Case Style Large Load Demand Management Service 34 filing(s).
Item 30 in the index was filed July 30th, 2026 by PUC OPDM and is the proposal for publication of new Section 25.521.
7/30/2026 PUC OPDM PRJ PROPOSAL FOR PUBLICATION NEW §25.521
Item 31 in the index is the Texas Register Acknowledgement of Receipt recording a comment deadline of September 4th, 2026.
7/30/2026 RULES & PROJECTS PRJ Texas Register Acknowledgement of Receipt - Comment Deadline 09/04/2026
Item 29 in the index was filed July 24th, 2026 and its description names a September 4th comment deadline.
7/24/2026 PUC RULES & PROJECTS PRJ OM Item No. 29 - Staff Memo & PFP w/Sept. 4 Comment Deadline
The last entry in the index is item 34, filed August 18th, 2026 by Modern Tex Consulting LLC.
8/18/2026 Modern Tex Consulting LLC COM Comments of Modern Tex Consulting LLC on Performance Reporting and Evaluation Under Proposed 16 TAC § 25.521
Item 32 was filed August 3rd, 2026 under the party name Jennifer Carrig with item type COM.
8/3/2026 Jennifer Carrig COM Large Load Demand Services "Say No to incentives"
Item 33 was filed August 3rd, 2026 under the party name Helen Bryant with item type PC and a description reading Objection to rule change.
8/3/2026 Helen Bryant PC Objection to rule change
Item 28 was filed under the party name Fedor Mikheev of the Texas A and M University Energy Institute with item type PC.
7/16/2026 Fedor Mikheev | Texas A&M University Energy Institute PC
Item 10 in the index was filed April 8th, 2026 by the Data Center Coalition.
4/8/2026 Data Center Coalition COM DCC Comments Regarding the Large Load Demand Management Service
The Public Utility Commission of Texas calendar feed lists a Public Comment Deadline for Friday, September 4th, 2026 tied to Project 58482.
Public Comment Deadline - Friday, September 4, 2026
Item 25 in the index was filed April 8th, 2026 by CyrusOne, LP.
4/8/2026 CyrusOne, LP COM CyrusOne, LP Comments in Response to Commission Staff's Questions
Item 26 in the index was filed April 12th, 2026 under a party name carrying two company names.
4/12/2026 Zack Butler | EnerShield AI | Blind Mice Labs PC
The filing index publishes five columns and they are the whole of what it says about a filing.
Item File Stamp Party Item Type Filing Description
The rule as published in the Texas Register does not contain the words data center in any spelling. It defines and uses the term large load customer in that place.
Participation in LLDMS is limited to large load customers that pre-qualify for participation at least annually.
The proposal imposes a maximum budget of 54 million dollars in a calendar year on the service.
Proposed subsection (f)(4) imposes a maximum budget of $54 million in a calendar year.
The service the rule requires is to be deployed in the event of an anticipated emergency condition.
to be deployed in the event of an anticipated emergency condition
The proposed rule requires a protocol allowing transmission-voltage customers to be curtailed during firm load shed.
allow the transmission-voltage customers to be curtailed during firm load shed