It is by decree of certain members of the federal judiciary that U.S. citizenship is conferred.
United States Department of Commerce is the US Government department that handles trademarks.
attorney general
The United States Department of State handles foreign affairs.
In the US, it is the Department of Agriculture. The Farm Services Agency specifically handles erosion control policy in conjunction with the Natural Resources Conservation Service.
The Secretary of State
the State department
The state department
The US cabinet agency that enforces the laws of the federal government is the Department of Justice (DOJ). The agency is responsible safety of the public from foreign and domestic threats.
The US Treasury Department is an executive department of the federal government.
The INS.
Assuming you mean in the US. The Department of the Treasury handles printing of all US funds.
The department of the US government that deals with energy issues is the U.S Department of Energy. The department is also known as the DOE.