yes labda, there is a procedure, but before that there are some nationals who will get on arrival visit visa. if your friend is from western country, i guess he/she will get on arrival visa. better to check with immigration. I am trying to to get this nationals list on net which i have seen some time ago, once i get this list, i will let you know. in the meantime you can also search for this list of nationals who can get on arrival visit visa.