sentences:  The holder of an E-2 visa may leave the United States at any time.Because there is no dedicated dependent visa class for E-2 visas, spouses and unmarried children (under 21) may receive derivative E-2 visas in order to accompany the principal immigrant.The duration of visa for a family member who is of a different nationality from the principal is determined by any reciprocal agreements between their country of nationality and the US.