Table 1. Localities Eligible for $201 ($42 M&IE) Per Diem Amount Under the High-Low Substantiation Method Per Diem Locality Effective Date of $201 Rate State Key City County and Other Defined Location CA Palo Alto/San Jose/Sunnyvale Santa Clara All year Palm Springs Riverside 1/1 - 5/31 San Francisco San Francisco All year Tahoe City Placer All year CO Aspen Pitkin 1/1 - 4/30 Silverthorne/Keystone Summit All year Telluride San Miguel 1/1 - 3/31 Vail Eagle 1/1 - 3/31 7/1 - 12/31 DC Washington, DC Washington, DC; the cities of Alexandria, Fairfax, and Falls Church, and the counties of Arlington, Fairfax, and Loudoun, in Virginia; and the counties of Montgomery and Prince Georges in Maryland All year FL Key West Monroe 1/1 - 4/30 ID Sun Valley City limits of Sun Valley All year IL Chicago Cook and Lake All year LA New Orleans/St. Bernard Orleans, St. Bernard, Plaquemine, and Jefferson Parishes 1/1 - 5/31 MD (For the counties of Montgomery and Prince Georges, see Washington, DC) Ocean City Worcester 6/15 - 10/31 MA Boston Suffolk All year Cambridge Middlesex County (except Lowell) All year Martha's Vineyard Dukes 6/1 - 10/15 MI Mackinac Island Mackinac All year Traverse City Grand Traverse 6/1 - 9/30 MT Big Sky Gallatin (except West Yellowstone Park) 1/1 - 4/30 11/1 - 12/31 NJ Cape May Cape May (except Ocean City) 6/1 - 11/30 Ocean City City limits of Ocean City 6/15 - 9/15 Piscataway/Belle Mead Somerset and Middlesex All year Princeton/Trenton Mercer County All year NY The Bronx/Brooklyn/Queens The boroughs of the Bronx, Brooklyn, and Queens All year Manhattan Manhattan All year Nassau County/Great Neck Nassau County All year Suffolk County Suffolk County All year White Plains City limits of White Plains All year PA Hershey City limits of Hershey 6/1 - 9/15 Philadelphia Philadelphia All year UT Park City Summit 1/1 - 3/31 12/15 - 12/31 VA (For the cities of Alexandria, Fairfax, and Falls Church, and the counties of Arlington, Fairfax, and Loudoun, see District of Columbia) Wintergreen Nelson All year