A primary purpose of the Act is to pressure the government of Iran to abandon its perceived goal of furthering its weaponized nuclear capabilities. To achieve this goal, the Act calls for the president, absent a waiver, to impose at least three sanctions upon entities who invest in the energy sector of Iran. This imposition of three sanctions is an increase from the previous sanction regime in which only two or more sanctions were to be imposed. In addition to the increase in the number of sanctions to be imposed, the Act increases the number of sanctions available to the president from six to nine.
Source: JD Supra