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Energy Sector › One Big Beautiful Bill Act › U.S. Treasury

A&O Shearman

Highlights of the New Sections 45Y and 48E Wind and Solar Beginning-of-Construction Guidance

A&O Shearman on

On July 4, 2025, Public Law 119-21, commonly known as the One Big Beautiful Bill Act (the “OBBBA”), became law and enacted significant changes to various renewable energy incentives, including the clean electricity production...more

Paul Hastings LLP

IRS and Treasury Tighten Beginning-of-Construction Rules for Wind and Solar

Paul Hastings LLP on

On Aug. 15, the U.S. Treasury Department and the Internal Revenue Service (IRS) released IRS Notice 2025-42, narrowing the rules for what qualifies as “beginning of construction” (BOC) under the One Big Beautiful Bill Act...more

Vinson & Elkins LLP

Beginning of Construction Guidance Eliminates 5% Safe Harbor (for Wind and Solar), but Physical Work Test Survives

Vinson & Elkins LLP on

On August 15, 2025, the Department of Treasury and the Internal Revenue Service (“IRS”) released guidance for wind and solar facilities under Sections 45Y and 48E (the “Tech-Neutral Tax Credits”) in the form of IRS Notice...more

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