In the Commonwealth of Massachusetts, the legal limit a driver’s blood alcohol content (BAC) when getting behind the wheel of motor vehicle is 0.08 grams of alcohol per hundred milliliters of blood. This is the legal limit across the United States due to the lobbying efforts of Mothers Against Drunk Driving (MADD) and others in support of cutting down on drunk driving fatalities in the nation.
Technically, the United States federal government does not have authority to create a mandatory blood alcohol limit in each of the several states because of the 10th Amendment states rights provision. However, Congress does have a enumerated plenary power to tax and spend for the general welfare of the American people. It is the spending clause that allows for a national drinking age and a national blood alcohol limit. Congress can give highway-funding grants to the states as its members see fit. If they wish to tie receipt of federal highway funding grants to the state’s choice to institute a specific law, they have the right to do so without violating the 10th Amendment. This is how Congress was able to a pass a national BAC limit in an attempt to curb drunk driving accidents, including drunk driving fatal accidents, in the United States. Continue reading