The three NUTS (Nomenclature of Territorial Units for Statistics) levels for Latvia (LV) are: NUTS 3 level is subdivided into LAU 1 units.
LAU (Local Administrative Units) in Latvia according to NUTS regulation (up to 31.12.2011): History of changes of LAU 2 codes till 1 July 2009 can be viewed here.
LAU in Latvia according to NUTS regulation (starting 01.01.2012): * Due to Administrative Territorial Reform (1 July 2009) administrative districts no longer exist as administrative units in Latvia.
LAU 2 codes from 1 July 2009 updated version.
Changes of LAU 2 codes on 1 July 2009 can be viewed here