Iron Man: Pretty sure Stark has never died. Captain America: Cap was killed when he was shot after losing out the long-drawn registration battle against Stark and the government (the conclusion to the Civil War arc in Fallen Son: The Death of Captain America). But he wasn't actually dead.
Minors (individuals under age 18) and people who are mentally incompetent do not have the legal capacity to enter into contracts. All other people are considered to have the legal capacity to enter into contracts. In New Mexico and most states, the legal age for entering into contracts is 18 (see NMSA Â§28-6-1). A contract between a minor and an adult may be cancelled upon request of the minor, but is binding on the adult.
Let's start with the short answer. Then we get into the details after that. If you want to open an account in your name (meaning you are the one entering into the contract), you must be a legal adult 18 or older. Additional rules may apply if you are between the ages of 18 and 21 years old. We will discuss these additional rules later. That's the gist of it.