Which part of the constitution

Expressed powers.

Explanation:

The interstate commerce clause is one of the federal government's expressed powers, which are: the power to tax, to borrow money, to regulate commerce and currency, to declare war, and to raise armies and maintain the navy.

the first part of the statute of limitations is the standard deadline, which gives victims of medical malpractice a certain number of years -- usually anywhere from two to six years, depending on the state -- after the malpractice occurred within which to file a lawsuit.