One key clarification is the presumption of examination of all positions by knowledgeable tax authorities and a resolution of disputes over those positions solely on the technical merits of each position. All relevant tax law is to be considered for the individual position. Positions that are not technically correct are allowed only where there is widely understood administrative practice allowing the position.[3] Thus, for example, a position would not be acceptable merely because an Internal Revenue Service agent allowed it in a previous year.