MI SB0103

Establishes the "Transmission Infrastructure Planning Act" to define rights of incumbent electric transmission companies regarding construction and operation of high-voltage transmission lines (100 kilovolts or more) in Michigan.

Grants incumbent electric transmission companies the right to construct, own, operate, maintain, and control regionally cost-shared transmission lines if the line is included in a plan approved by a recognized electric planning authority and interconnects to their facilities.

Requires incumbent electric transmission companies to notify the Michigan Public Service Commission within 90 days of approval and provide detailed cost estimates within 180 days, with quarterly updates on construction costs and competitive bidding documentation.

Establishes cost accountability measures including reimbursement of up to $250,000 in commission litigation costs (100% if complaint is granted, 25% if denied) if the commission challenges construction costs at the Federal Energy Regulatory Commission.

Clarifies that the act does not grant eminent domain powers, alter Public Service Commission authority, modify property owner rights, or affect existing transmission company contracts and obligations under federal or state law.