Iowa Code

Iowa Code § 476.4 (2026)

Tariffs filed

✓ current as of July 2026

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1. Every public utility shall file with the commission tariffs showing the rates and charges for its public utility services and the rules and regulations under which such services were furnished, on April 1, 1963, which rates and charges shall be subject to investigation by the commission as provided in section 476.3, and upon such investigation the burden of establishing the reasonableness of such rates and charges shall be upon the public utility filing the same. These filings shall be made under such rules as the commission may prescribe within such time and in such form as the commission may designate. In prescribing rules and regulations with respect to the form of tariffs and any other regulations, the\n\nTue Dec 09 22:08:33 2025 Iowa Code 2026, Chapter 476 (110, 2) 9 PUBLIC UTILITY REGULATION, §476.6\n\ncommission shall, in the case of public utilities subject to regulation by any federal agency, give due regard to any corresponding rules and regulations of such federal agency, to the end that unnecessary duplication of effort and expense may be avoided so far as reasonably possible. Each public utility shall keep copies of its tariffs open to public inspection under such rules as the commission may prescribe.

2. No later than January 1, 2015, a telephone utility is required to file tariffs as provided in this section only for such wholesale services as may be specified by the commission.

3. Every rate, charge, rule, and regulation contained in any filing made with the Iowa state commerce commission on or prior to July 4, 1963, shall be effective as of such date, subject, however, to investigation as provided in this chapter. If any such filing is made prior to the time the Iowa state commerce commission prescribes rules, and if such filing does not comply as to form or substance with such rules, then the public utility which filed the same shall, within a reasonable time after the adoption of such rules, make a new filing or filings complying with such rules, which new filing or filings shall be deemed effective as of July 4, 1963. [C66, 71, 73, 75, §490A.4; C77, 79, 81, §476.4] 2014 Acts, ch 1099, §4; 2018 Acts, ch 1135, §7; 2020 Acts, ch 1063, §263; 2021 Acts, ch 80, §308; 2024 Acts, ch 1170, §369 Referred to in §476.43 \n

Notes of Decisions

Cited in 9 cases, 1988–2010 · leading case: City of Coralville v. Iowa Utils. Bd., 750 N.W.2d 523 (Iowa 2008).

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City of Coralville v. Iowa Utils. Bd., 750 N.W.2d 523 (Iowa 2008). · cites it 2× “Iowa Code § 476.4 (“Every public utility shall file with the board tariffs showing the rates and charges for its public utility services .”

Off. of Consum. Advocate v. Iowa State Com. Comm'n, 432 N.W.2d 148 (Iowa 1988). · cites it 3× “Iowa Code § 476.4 ; 73B C.J.S. Public Utilities § 23, at 182 (1983).”

Est. of Pearson v. Interstate Power & Light Co., 700 N.W.2d 333 (Iowa 2005). “” Iowa Code § 476.4 . The utility company cannot change a rate, charge, schedule, or regulation unless and until it files a tariff with the regulatory authority.”

Iowa Network Servs., Inc. v. Qwest Corp., 385 F. Supp. 2d 850 (S.D. Iowa 2005). “(citing Iowa Code § 476.4 ). Based on this structure, the Iowa Legislature implemented various rules and definitions found in the Iowa Administrative Code to guide the Board in regulating the telecommunications industry in Iowa.”

Nw. Bell Tel. Co. v. Iowa Utils. Bd., 477 N.W.2d 678 (Iowa 1991). · cites it 2× “6 (1991) (requiring public utilities to file tariffs with the board and predicating board approval on a finding that the rates, charges, schedules and regulations of the utility are just and reasonable).”

Teleconnect Co. v. U.S. West Commc'ns, Inc., 508 N.W.2d 644 (Iowa 1993). “” Under this regulatory scheme, every public utility must “file with the board tariffs showing the rates and charges for its public utility services,” and every public utility “shall keep copies of its tariffs open to public inspection under such rules as the board may prescribe.”

Aventure Commc'n Tech., L.L.C. v. Iowa Utils. Bd., 734 F. Supp. 2d 636 (N.D. Iowa 2010). “They also point out that Iowa Code § 476.4 , which requires the filing of tariffs, also establishes the IUB’s authority over the procedures that govern those filings.”

Rural Iowa Indep. Tel. Ass'n v. Iowa Utils. Bd., 385 F. Supp. 2d 797 (S.D. Iowa 2005). “(citing Iowa Code § 476.4 ). Based on this structure, the Iowa Legislature implemented various rules and definitions found in the Iowa Administrative Code to guide the Board in regulating the telecommunications industry in Iowa.”

City Of Coralville, Iowa Vs. Iowa Utils. Bd. (Dep't Of Com.) (Iowa 2008). · cites it 2× “Iowa Code § 476.4 (“Every public utility shall file with the board tariffs showing the rates and charges for its public utility services .”

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