Coming of age
In the United States, teenagers are allowed to drive at 16 in all states except New Jersey, which requires drivers to be 17 and older, and sometimes receive the responsibility of owning their own car. Teenagers may drive at age 15 in Idaho and Montana. At 16, teenagers are also old enough to donate blood and work in most establishments. At 18 one is legally considered an adult and can vote and join the military. The legal age for purchasing and consuming alcohol and recreational marijuana, the latter of which is only legal in the District of Columbia, Colorado, Oregon, Washington, California, Hawaii, Massachusetts, Nevada, and Alaska, is 21. The legal age for purchasing and consuming tobacco products is 18 in most states; 19 in Alabama, Alaska and Utah; and 21 in California, New Jersey, Oregon, Hawaii and Maine. Multiple localities have also raised the minimum purchase age independent of state laws.
Age of consent
The age of consent is a legal barrier to the minor's ability to consent and therefore obtaining consent is not in general a defense to having sexual relations with a person under the prescribed age, for example:A growing number of countries have specific extraterritorial legislation that prosecutes their citizens in their homeland should they engage in illicit sexual conduct in a foreign country with children. In 2008, ECPAT reported that 44 countries had extraterritorial child sex legislation. For example, PROTECT Act of 2003, a federal United States law bans sexual activity by its citizens with foreigners or with U.S. citizens from another state, if the partner is under 18 and the activity is illegal under the federal, state, or local law. This applies in cases where any of the partners travels into or out of the United States, or from one state into another, for the purpose of an illegal sexual encounter.