Three distinct state-level instruments and their May status: (1) Ohio Prohibition of Data Center Construction Amendment — a citizen-initiated state constitutional amendment that would write a 25 MW cap into Ohio's constitution. AG Dave Yost certified the initiative for signature gathering March 26; Ohio Ballot Board unanimously certified the proposed amendment in early April. Petitioners need 413,488 valid signatures by July 1, 2026 (10% of the most recent gubernatorial vote total, plus county-level distribution minimums in 44+ of 88 counties). 13abc reporting May 8 confirmed petitioners are actively in the collection phase but did not give a current count. If the signature threshold is met by July 1, the measure goes on the November 3, 2026 general-election ballot as Issue 1 (or whatever number Ohio assigns). The 25 MW cap is materially below typical hyperscale (200-400 MW) and below typical mid-size colocation (50-100 MW) — if passed, Ohio essentially exits the hyperscale data-center market by constitutional law. (2) Indiana SB 257 (Sen. Chris Garten R, filed January 2026) would have directed the Indiana Utility Regulatory Commission to deny rate increases attributable solely to data-center cost-of-service in any utility's general rate case, with a separate provision targeting facilities exceeding a specified MW threshold and employing fewer than 50 full-time on-premises employees. The bill never received a hearing in the Senate Utilities Committee and is now functionally dead for the 2026 session; advocates expect a re-file in the 2027 session. (3) Maine LD 307 (18-month moratorium on facilities >20 MW, would have been the first-of-kind state moratorium in the US): Gov. Mills vetoed April 24-25, the legislature failed to override the veto, and the bill is dead for 2026. Mills signed an executive order April 29 establishing a 15-member Maine Data Center Advisory Council to study the issue and report to the legislature in early 2027 — legislative-mode default state for Maine through year-end. Tom's Hardware tracker now shows 78 jurisdictions tracked, 50 active bans, 4 permanent — local-level activity continues to outpace state-level activity by ~15:1 on velocity.
Primary source · Ballotpedia / Ohio Capital Journal / 13abc / Indiana General Assembly / Maine Governor's Office ↗
Why it matters
Three updates and a structural read. (1) The Ohio ballot initiative is the highest-blast-radius single regulatory event tracked in this newsletter to date. If 413,488 signatures are submitted by July 1 *and* validated, *and* the measure passes by simple majority on November 3, Ohio's constitution will prohibit any data center >25 MW — which by definition removes Ohio (currently the 6th-largest US data-center market by IT load, anchored by AEP territory's New Albany / Columbus cluster, plus emerging Lordstown / Mahoning Valley sites) from the hyperscale-eligible state list. The ~$30B+ of announced Ohio data-center capital expenditure (AEP's queued Lordstown loads, Microsoft New Albany, AWS Hilliard, Cologix Columbus) could be partially or fully stranded. The base-rate probability is low — citizen-initiative success requires (a) signature validity rates ~70-80%, (b) county distribution discipline, (c) survival of legal challenges, (d) majority approval on Nov 3 — but each step has happened at the rates required, and the Ohio Capital Journal's reporting suggests volunteer signature operation is meeting the per-county distribution targets. Cliff's regulatory-risk module needs a 'state-level constitutional ban in active signature collection' tier with Ohio at the top of the watch list, and any Ohio site under active diligence (especially Lordstown / Mahoning Valley which is also under a separate municipal moratorium covered Wed/Thu) needs an Ohio-specific risk overlay through November 3. (2) Indiana SB 257's no-hearing death is the *opposite* signal from Maine's veto-and-advisory-council death. Maine's death came with an executive order setting up a study commission — Maine is *actively* moving even after the moratorium failed. Indiana's death is silent — no hearing, no committee debate, no follow-on study commission, no governor-level action. Indiana's posture remains 'rate-increases-from-DCs-pass-through-to-residential-ratepayers' which is the structural opposite of Wisconsin's We Energies VLC tariff, Ohio's pending AEP rate case, and Florida's SB 484 just-signed cost-of-service mandate. The strategic implication: Indiana is the last large data-center market in the eastern US where the legislative status quo still favors developer-cost-shifting onto residential ratepayers, which makes Indiana the highest-cost-arbitrage state for hyperscaler siting — but also the highest-political-instability state if Indiana's legislature makes a sharper reversal in 2027. (3) Maine's advisory council pattern (15 members, report due early 2027) is the new template — a way for governors to preserve no-immediate-moratorium policy without giving up pressure-relief for environmental coalitions. Watch for the same template in Pennsylvania (active hyperscale buildout, active environmental opposition), Massachusetts (already has a small-scale framework), and possibly Michigan (active Sault Ste. Marie / Lansing siting). Cliff's regulatory-risk module should add a 'governor-level study-commission active' tier separate from 'moratorium active' — same eventual policy effect, very different short-term submission-readiness implications. The structural read across all three: state-level moratorium and tax-incentive activity is *highly* path-dependent, with the same 'ban data centers' outcome reachable via at least four different procedural routes (direct moratorium, ballot initiative, no-incentive-bill-passes, study-commission-recommends-moratorium), each with different timelines and reversibility. Cliff's regulatory-knowledge graph needs to model the *route* not just the *destination*.
Related filings
PA + OR + WI + FL / 14-day cluster
Three regulatory events in the same 24-hour window on May 8 — Pennsylvania PUC's model-tariff vote, PPL Electric's pending rate-case settlement (filed March 13, ALJ recommendation April 17, effective July 1), and Oregon PUC's PGE Schedule 96 directive —...
WHYY / WESA / Utility Dive / KGW / KOIN / Beaver County Radio / RTO Insider ↗
MI Penn Twp / IN Washington / FL Nassau / WI Sheboygan
Three more entries in the local-moratorium tape, each illustrating a different sub-pattern. Penn Township MI: pure preemptive moratorium with no land sold and no developer named. The Diamond Lake Association (the local lake-property-owner organization) drove...
WNDU / WSBT / IPM News / Washington Times-Herald / News4Jax / Seehafer News ↗
CO HB 1030 / killed 11-2
HB 1030 was Colorado's primary 2026 attempt to attract data-center investment via tax incentives — the bill was first introduced in January and modeled loosely on the sales-and-use exemption regimes that Texas, Virginia, Georgia, Ohio, Iowa, Nebraska, and...
KUNC / CPR News / The Colorado Sun / The Durango Herald ↗
Hyperscaler / footprint
Two large hyperscaler footprint moves this past week. AWS: ~$15B planned investment in Northern Indiana for multiple data center campuses adding approximately 2.4 GW of capacity dedicated to cloud computing and AI workloads. Microsoft: the $3.3B Fairwater...
Microsoft / Mount Pleasant village ↗