The Government of Canada's official website to apply for an eTA. It only costs $7 CAD. Most eTA applications are approved within minutes of applying. New entry requirement now in effect: visa-exempt foreign nationals who fly to or transit through Canada need an Electronic Travel Authorization (eTA). Exceptions include U.S. citizens and travellers with a valid Canadian visa. Note: The leniency period that allows travellers to board their flight without an eTA ends soon. Be prepared: Apply for an eTA before you book your flight to Canada. Most applicants get approved within minutes.
The brain is fully developed around the age of 20-25 like the above say. But making rational decisions has nothing to do with that, you can make those at any age. At about age 23 the final stages of brain development occur. The last part of development to occur is the part of the brain that is involved in rational decision making.
Girls' brains can begin maturing from the age of 10 while some men have to wait until 20 before the same organisational structures take place, Newcastle University scientists have found. It is a well known truism that girls mature faster than boys. But now scientists have discovered for the first time that their brains can develop up to ten years earlier than boys. Newcastle University stumbled upon the finding while conducting experiments into how the brain stores information.