As stated in the instructions for application, if u are not a native speaker of english from an english speaking country such as UK, US, Australia. Would be advisable to take yr ILETS. I am from Singapore, with a double masters from Australia and US, bachelors also from US, educated all my life in english medium, but yet i had to take my ILETS to prove my proficiency in English, so do not expect yr friend who has only been educated 14 yrs to pass the qualification round and get full scores if there is no hard evidence to prove his or her proficiency.
If yr friend is really ok with english then no fear in taking ILETS. I had a score of 8 for all levels, so, no worries for your friend too if he is indeed proficiency in english.