The purpose of this memorandum is to assess the impact on the distribution of the American Community Survey (ACS) sample by including Minor Civil Divisions (MCDs) in the twelve "strong" MCD states as design areas when determining the block level sampling strata assignment - and thus the sampling rate - for the ACS. Beginning with the 2002 sample selection, MCDs were considered for inclusion as design areas. This decision was made for two reasons: 1) MCDs in the 12 "strong" MCD states were included in the Census 2000 Long Form sample design; and 2) The desire to produce reliable ACS estimates for MCDs in the 12 "strong" MCD states.