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Introduction

SECTION 4. DRAFTING

Internal Revenue Bulletin 2018-42 · 2026-10-03 edition · updated 2026-10-04 · United States

INFORMATION

The principal author of this notice is Innessa Glazman of the Office of Associate Chief Counsel (Income Tax & Accounting). For further information regarding this notice, please contact Ms. Glazman at (202) 317-7006 (not a tollfree number).

APPENDIX

Alabama

Counties of Baldwin, Barbour, Bibb, Blount, Bullock, Butler, Calhoun, Cherokee, Chilton, Clarke, Cleburne, Coffee, Conecuh, Covington, Crenshaw, Cullman, Dale, DeKalb, Escambia, Etowah, Fayette, Geneva, Greene, Hale, Henry, Houston, Jackson, Jefferson, Lamar, Lee, Limestone, Lowndes, Macon, Madison, Marshall, Mobile, Monroe, Montgomery, Pickens, Pike, Russell, Saint Clair, Shelby, Sumter, Talladega, Tuscaloosa, Walker, Winston.

Arizona

Counties of Apache, Cochise, Coconino, Gila, Graham, Greenlee, La Paz, Maricopa, Mohave, Navajo, Pima, Pinal, Santa Cruz, Yavapai, Yuma.

Arkansas

Counties of Arkansas, Ashley, Baxter, Benton, Boone, Bradley, Calhoun, Carroll, Chicot, Clark, Clay, Cleburne, Cleve

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land, Columbia, Conway, Craighead, Crawford, Cross, Dallas, Desha, Drew, Faulkner, Franklin, Fulton, Garland, Grant, Greene, Hempstead, Hot Spring, Howard, Independence, Izard, Jackson, Jefferson, Johnson, Lafayette, Lawrence, Lee, Lincoln, Little River, Logan, Lonoke, Madison, Marion, Miller, Mississippi, Monroe, Montgomery, Nevada, Newton, Ouachita, Perry, Phillips, Pike, Poinsett, Polk, Pope, Prairie, Pulaski, Randolph, Saint Francis, Saline, Scott, Searcy, Sebastian, Sevier, Sharp, Stone, Union, Van Buren, Washington, White, Woodruff, Yell.

California

Counties of Del Norte, Fresno, Imperial, Kern, Kings, Los Angeles, Madera, Mariposa, Merced, Modoc, Monterey, Orange, Riverside, San Bernardino, San Diego, San Luis Obispo, Santa Barbara, Siskiyou, Tulare, Ventura.

Colorado

Counties of Alamosa, Archuleta, Baca, Bent, Boulder, Chaffee, Cheyenne, Clear Creek, Conejos, Costilla, Crowley, Custer, Delta, Dolores, Eagle, Elbert, El Paso, Fremont, Garfield, Gilpin, Grand, Gunnison, Hinsdale, Huerfano, Jackson, Kiowa, Kit Carson, Lake, La Plata, Larimer, Las Animas, Lincoln, Mesa, Mineral, Moffat, Montezuma, Montrose, Otero, Ouray, Park, Pitkin, Prowers, Pueblo, Rio Blanco, Rio Grande, Routt, Saguache, San Juan, San Miguel, Summit, Teller.

District of Columbia

District of Columbia.

Florida

Counties of Bay, Broward, Calhoun, Collier, Escambia, Franklin, Gadsden, Gulf, Hendry, Holmes, Jackson, Jefferson, Lee, Leon, Liberty, Madison, MiamiDade, Monroe, Okaloosa, Palm Beach, Santa Rosa, Taylor, Wakulla, Walton, Washington.

Georgia

Counties of Appling, Atkinson, Bacon, Baker, Bartow, Berrien, Brantley, Brooks, Bryan, Bulloch, Calhoun, Camden, Ca

toosa, Charlton, Chatham, Chattahoochee, Chattooga, Clay, Clinch, Coffee, Colquitt, Cook, Crisp, Dade, Decatur, Dooly, Dougherty, Early, Echols, Effingham, Evans, Floyd, Gilmer, Glynn, Gordon, Grady, Irwin, Jeff Davis, Lanier, Lee, Liberty, Long, Lowndes, McIntosh, Macon, Marion, Miller, Mitchell, Murray, Muscogee, Pierce, Polk, Quitman, Randolph, Schley, Screven, Seminole, Stewart, Sumter, Tattnall, Taylor, Terrell, Thomas, Tift, Turner, Walker, Ware, Wayne, Webster, Whitfield, Wilcox, Worth.

Hawaii

Counties of Hawaii, Kauai, Maui.

Idaho

Counties of Bonner, Boundary, Canyon, Cassia, Clearwater, Kootenai, Owyhee, Payette, Shoshone, Washington.

Illinois

Counties of Adams, Calhoun, Greene, Hancock, Henderson, Jersey, Macoupin, Madison, Mercer, Monroe, Randolph, Rock Island, Saint Clair, Warren.

Iowa

Counties of Adair, Allamakee, Appanoose, Clarke, Davis, Decatur, Des Moines, Henry, Jasper, Jefferson, Keokuk, Lee, Louisa, Lucas, Madison, Mahaska, Marion, Marshall, Monroe, Polk, Ringgold, Tama, Taylor, Union, Van Buren, Wapello, Warren, Wayne, Winneshiek.

Kansas

Counties of Allen, Anderson, Atchison, Barber, Barton, Bourbon, Brown, Butler, Chase, Chautauqua, Cherokee, Clark, Clay, Coffey, Comanche, Cowley, Crawford, Dickinson, Doniphan, Douglas, Edwards, Elk, Ellis, Ellsworth, Finney, Ford, Franklin, Geary, Gove, Grant, Gray, Greeley, Greenwood, Hamilton, Harper, Harvey, Haskell, Hodgeman, Jackson, Jefferson, Johnson, Kearny, Kingman, Kiowa, Labette, Lane, Leavenworth, Lincoln, Linn, Lyon, McPherson, Marion, Marshall, Meade, Miami, Montgomery, Morris, Morton, Nemaha, Neosho, Ness, Osage, Osborne, Ottawa, Pawnee, Pottawatomie, Pratt, Reno, Rice, Riley, Rush, Russell, Sa

line, Scott, Sedgwick, Seward, Shawnee, Stafford, Stanton, Stevens, Sumner, Trego, Wabaunsee, Wallace, Wichita, Wilson, Woodson, Wyandotte.

Louisiana

Parishes of Avoyelles, Bienville, Bossier, Caddo, Caldwell, Catahoula, Claiborne, Concordia, De Soto, East Carroll, Franklin, Grant, Jackson, La Salle, Lincoln, Madison, Morehouse, Natchitoches, Ouachita, Rapides, Red River, Richland, Sabine, Tensas, Union, Vernon, Webster, West Carroll, Winn.

Maine

Counties of Cumberland, Hancock, Knox, Lincoln, Sagadahoc, Waldo.

Maryland

City of Baltimore. Counties of Anne Arundel, Baltimore, Charles, Harford, Howard, Montgomery, Prince George’s.

Michigan

Counties of Antrim, Charlevoix, Cheboygan, Crawford, Emmet, Kalkaska, Mackinac, Montmorency, Oscoda, Otsego, Presque Isle.

Minnesota

Counties of Beltrami, Fillmore, Houston, Koochiching, Lake of the Woods, Marshall, Pennington, Roseau.

Mississippi

Counties of Attala, Bolivar, Choctaw, Claiborne, Hinds, Holmes, Issaquena, Jefferson, Kemper, Lauderdale, Leake, Lowndes, Madison, Neshoba, Newton, Noxubee, Oktibbeha, Rankin, Scott, Sharkey, Warren, Washington, Winston, Yazoo.

Missouri

City of Saint Louis. Counties of Adair, Andrew, Atchison, Audrain, Barry, Barton, Benton, Boone, Buchanan, Butler, Caldwell, Callaway, Camden, Carroll, Carter, Cass, Cedar, Chariton, Christian, Clark, Clay, Clinton, Cole, Cooper, Crawford, Dade, Dallas, Daviess, DeKalb, Dent, Douglas, Dunklin, Franklin, Gasconade, Gentry, Greene, Grundy, Harri

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son, Hickory, Holt, Howard, Howell, Iron, Jackson, Jasper, Jefferson, Johnson, Knox, Laclede, Lafayette, Lawrence, Lewis, Lincoln, Linn, Livingston, McDonald, Macon, Madison, Maries, Mercer, Moniteau, Monroe, Morgan, New Madrid, Newton, Nodaway, Oregon, Osage, Ozark, Pemiscot, Pettis, Phelps, Platte, Polk, Pulaski, Putnam, Randolph, Ray, Reynolds, Ripley, Saint Charles, Saint Clair, Sainte Genevieve, Saint Francois, Saint Louis, Saline, Schuyler, Scotland, Shannon, Shelby, Stoddard, Stone, Sullivan, Taney, Texas, Vernon, Warren, Washington, Wayne, Webster, Worth, Wright.

Montana

Counties of Big Horn, Blaine, Broadwater, Carter, Cascade, Chouteau, Custer, Daniels, Dawson, Fallon, Fergus, Flathead, Gallatin, Garfield, Glacier, Golden Valley, Hill, Jefferson, Judith Basin, Lake, Lewis and Clark, Liberty, Lincoln, McCone, Meagher, Mineral, Missoula, Musselshell, Petroleum, Phillips, Pondera, Powder River, Powell, Prairie, Richland, Roosevelt, Rosebud, Sanders, Sheridan, Teton, Toole, Treasure, Valley, Wheatland, Wibaux, Yellowstone.

Nebraska

Counties of Pawnee, Richardson.

Nevada

Counties of Clark, Elko, Humboldt, Washoe.

New Mexico

Counties of Bernalillo, Catron, Chaves, Cibola, Colfax, Curry, DeBaca, Dona Ana, Eddy, Grant, Guadalupe, Harding, Hidalgo, Lea, Lincoln, Los Alamos, Luna, McKinley, Mora, Otero, Quay, Rio Arriba, Roosevelt, Sandoval, San Juan, San Miguel, Santa Fe, Sierra, Socorro, Taos, Torrance, Union, Valencia.

New York

Counties of Clinton, Essex, Franklin, Hamilton, Warren.

North Carolina

Counties of Cabarrus, Caswell, Catawba, Chatham, Cherokee, Clay, Cleve

land, Columbus, Cumberland, Davidson, Davie, Durham, Edgecombe, Forsyth, Franklin, Gaston, Graham, Granville, Guilford, Halifax, Harnett, Hoke, Iredell, Johnston, Lee, Lincoln, Mecklenburg, Montgomery, Moore, Nash, Northampton, Orange, Person, Randolph, Richmond, Robeson, Rockingham, Rowan, Scotland, Stanly, Stokes, Surry, Union, Vance, Wake, Warren, Yadkin.

North Dakota

Counties of Adams, Barnes, Benson, Billings, Bottineau, Bowman, Burke, Burleigh, Cass, Cavalier, Dickey, Divide, Dunn, Eddy, Emmons, Foster, Golden Valley, Grand Forks, Grant, Griggs, Hettinger, Kidder, LaMoure, Logan, McHenry, McIntosh, McKenzie, McLean, Mercer, Morton, Mountrail, Nelson, Oliver, Pembina, Pierce, Ramsey, Ransom, Renville, Richland, Rolette, Sargent, Sheridan, Sioux, Slope, Stark, Steele, Stutsman, Towner, Traill, Walsh, Ward, Wells, Williams.

Ohio

Counties of Ashland, Columbiana, Coshocton, Cuyahoga, Erie, Fulton, Geauga, Guernsey, Holmes, Huron, Knox, Licking, Lorain, Lucas, Mahoning, Medina, Morrow, Muskingum, Ottawa, Portage, Richland, Sandusky, Stark, Summit, Trumbull, Tuscarawas, Wayne, Wood.

Oklahoma

Counties of Adair, Alfalfa, Atoka, Beaver, Beckham, Blaine, Bryan, Caddo, Canadian, Carter, Cherokee, Choctaw, Cimarron, Cleveland, Coal, Comanche, Cotton, Craig, Creek, Custer, Delaware, Dewey, Ellis, Garfield, Garvin, Grady, Grant, Greer, Harmon, Harper, Haskell, Hughes, Jackson, Jefferson, Johnston, Kay, Kingfisher, Kiowa, Latimer, Le Flore, Lincoln, Logan, Love, McClain, McCurtain, McIntosh, Major, Marshall, Mayes, Murray, Muskogee, Noble, Nowata, Okfuskee, Oklahoma, Okmulgee, Osage, Ottawa, Pawnee, Payne, Pittsburg, Pontotoc, Pottawatomie, Pushmataha, Roger Mills, Rogers, Seminole, Sequoyah, Stephens, Texas, Tillman, Tulsa, Wagoner, Washington, Washita, Woods, Woodward.

Oregon

Counties of Baker, Benton, Clackamas, Clatsop, Columbia, Coos, Crook, Curry, Deschutes, Douglas, Gilliam, Grant, Harney, Hood River, Jackson, Jefferson, Josephine, Klamath, Lake, Lane, Lincoln, Linn, Malheur, Marion, Morrow, Multnomah, Polk, Sherman, Tillamook, Umatilla, Union, Wallowa, Wasco, Washington, Wheeler, Yamhill.

Pennsylvania

Counties of Berks, Bradford, Carbon, Chester, Columbia, Dauphin, Lackawanna, Lancaster, Lebanon, Lehigh, Luzerne, Monroe, Montour, Northampton, Northumberland, Pike, Schuylkill, Sullivan, Susquehanna, Wayne, Wyoming, York.

Rhode Island

Counties of Kent, Providence, Washington.

South Carolina

Counties of Abbeville, Aiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley, Calhoun, Charleston, Chester, Chesterfield, Clarendon, Colleton, Darlington, Dillon, Dorchester, Edgefield, Fairfield, Florence, Georgetown, Greenwood, Hampton, Horry, Jasper, Kershaw, Lancaster, Laurens, Lee, Lexington, McCormick, Marion, Marlboro, Newberry, Orangeburg, Richland, Saluda, Sumter, Union, Williamsburg, York.

South Dakota

Counties of Aurora, Beadle, Bennett, Bon Homme, Brown, Brule, Buffalo, Butte, Campbell, Charles Mix, Clark, Codington, Corson, Custer, Davison, Day, Dewey, Douglas, Edmunds, Fall River, Faulk, Grant, Gregory, Haakon, Hand, Harding, Hughes, Hutchinson, Hyde, Jackson, Jerauld, Jones, Kingsbury, Lawrence, Lyman, McPherson, Marshall, Meade, Mellette, Miner, Oglala Lakota, Pennington, Perkins, Potter, Roberts, Sanborn, Spink, Stanley, Sully, Todd, Tripp, Walworth, Yankton, Ziebach.

Tennessee

Counties of Anderson, Bedford, Bledsoe, Bradley, Campbell, Claiborne, Cof

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fee, Dyer, Fentress, Franklin, Giles, Grainger, Grundy, Hamblen, Hamilton, Hancock, Hardin, Hawkins, Jefferson, Knox, Lake, Lauderdale, Lawrence, Lincoln, Loudon, McMinn, McNairy, Marion, Marshall, Meigs, Monroe, Moore, Morgan, Obion, Polk, Rhea, Scott, Sequatchie, Shelby, Union, Van Buren, Warren, Wayne.

Texas

Counties of Anderson, Andrews, Angelina, Aransas, Archer, Armstrong, Atascosa, Austin, Bailey, Bandera, Bastrop, Baylor, Bee, Bell, Bexar, Blanco, Borden, Bosque, Bowie, Brazoria, Brazos, Brewster, Briscoe, Brooks, Brown, Burleson, Burnet, Caldwell, Calhoun, Callahan, Cameron, Camp, Carson, Cass, Castro, Chambers, Cherokee, Childress, Clay, Cochran, Coke, Coleman, Collin, Collingsworth, Colorado, Comal, Comanche, Concho, Cooke, Coryell, Cottle, Crane, Crockett, Crosby, Culberson, Dallam, Dallas, Dawson, Deaf Smith, Delta, Denton, DeWitt, Dickens, Dimmit, Donley, Duval, Eastland, Ector, Edwards, Ellis, El Paso, Erath, Falls, Fannin, Fayette, Fisher, Floyd, Foard, Fort Bend, Franklin, Freestone, Frio, Gaines, Galveston, Garza, Gillespie, Glasscock, Goliad, Gonzales, Gray, Grayson, Gregg, Grimes, Guadalupe, Hale, Hall, Hamilton, Hansford, Hardeman, Hardin, Harrison, Hartley, Haskell, Hays, Hemphill, Henderson, Hidalgo, Hill, Hockley, Hood, Hopkins, Houston, Howard, Hudspeth, Hunt, Hutchinson, Irion, Jack, Jackson, Jasper, Jeff Davis, Jefferson, Jim Hogg, Jim Wells, Johnson, Jones, Karnes, Kaufman, Kendall, Kenedy, Kent, Kerr, Kimble, King, Kinney, Kleberg, Knox, Lamar, Lamb, Lampasas, La Salle, Lavaca, Lee, Leon, Liberty, Limestone, Lipscomb, Live Oak, Llano, Loving, Lubbock, Lynn, McCulloch, McLennan, McMullen, Madison, Marion, Martin, Mason, Matagorda, Maverick, Medina, Menard, Midland, Milam, Mills, Mitchell, Montague, Moore, Morris, Motley, Nacogdoches, Navarro, Newton, Nolan, Nueces, Ochiltree, Oldham, Orange, Palo Pinto, Panola, Parker, Parmer, Pecos, Polk, Potter, Presidio, Rains, Randall, Reagan, Real, Red River, Reeves, Refugio, Roberts, Robertson, Rockwall, Runnels, Rusk, Sabine, San Augustine, San Patricio, San Saba, Schlei

cher, Scurry, Shackelford, Shelby, Sherman, Smith, Somervell, Starr, Stephens, Sterling, Stonewall, Sutton, Swisher, Tarrant, Taylor, Terrell, Terry, Throckmorton, Titus, Tom Green, Travis, Trinity, Tyler, Upshur, Upton, Uvalde, Val Verde, Van Zandt, Victoria, Ward, Washington, Webb, Wharton, Wheeler, Wichita, Wilbarger, Willacy, Williamson, Wilson, Winkler, Wise, Wood, Yoakum, Young, Zapata, Zavala.

Utah

Counties of Beaver, Box Elder, Cache, Carbon, Daggett, Davis, Duchesne, Emery, Garfield, Grand, Iron, Juab, Kane, Millard, Morgan, Piute, Rich, Salt Lake, San Juan, Sanpete, Sevier, Summit, Tooele, Uintah, Utah, Wasatch, Washington, Wayne, Weber.

Vermont

Counties of Addison, Bennington, Caledonia, Chittenden, Franklin, Grand Isle, Lamoille, Orange, Orleans, Rutland, Washington, Windham, Windsor.

Virginia

Cities of Alexandria, Bedford, Buena Vista, Charlottesville, Colonial Heights, Danville, Emporia, Fairfax, Falls Church, Fredericksburg, Harrisonburg, Hopewell, Lexington, Lynchburg, Manassas, Manassas Park, Martinsville, Petersburg, Roanoke, Salem, Staunton, Waynesboro. Counties of Albemarle, Amelia, Amherst, Appomattox, Arlington, Augusta, Bedford, Botetourt, Brunswick, Buckingham, Campbell, Caroline, Charles City, Charlotte, Chesterfield, Culpeper, Cumberland, Dinwiddie, Essex, Fairfax, Fauquier, Floyd, Fluvanna, Franklin, Goochland, Greene, Greensville, Halifax, Hanover, Henrico, Henry, James City, King George, Loudoun, Louisa, Lunenburg, Madison, Mecklenburg, Montgomery, Nelson, New Kent, Nottoway, Orange, Page, Patrick, Pittsylvania, Powhatan, Prince Edward, Prince George, Prince William, Rappahannock, Richmond, Roanoke, Rockbridge, Rockingham, Southampton, Spotsylvania, Stafford, Surry, Sussex, Warren, Westmoreland.

Washington

Counties of Adams, Asotin, Benton, Chelan, Clallam, Clark, Columbia, Cowlitz, Douglas, Ferry, Franklin, Garfield, Grant, Grays Harbor, Island, Jefferson, King, Kitsap, Kittitas, Klickitat, Lewis, Lincoln, Mason, Okanogan, Pacific, Pend Oreille, Pierce, San Juan, Skagit, Skamania, Snohomish, Spokane, Stevens, Thurston, Wahkiakum, Walla Walla, Whatcom, Whitman, Yakima.

Wisconsin

Counties of Clark, Crawford, Eau Claire, Grant, Jackson, Jefferson, Juneau, Kenosha, La Crosse, Marathon, Milwaukee, Monroe, Racine, Rock, Trempealeau, Vernon, Walworth, Waukesha, Wood.

Wyoming

Counties of Albany, Campbell, Carbon, Crook, Lincoln, Sheridan, Sweetwater, Uinta.

Guidance Under Section 451(b) Relating to Market Discount

Notice 2018–80

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