Hello Sebseb,
Jettes un oeil sur ces liens
http://www.immi.gov.au/skills/skillsele ... class-457/Pour la partie IELTS, c'est sur cette page :
http://www.immi.gov.au/skilled/skilled- ... ployee.htm[...]
English language requirementsEvidence of an IELTS score must be produced if required when submitting a visa application. It is important that you can speak, write and understand a sufficient level of English while you are in Australia. The department uses the International English Language Testing System (IELTS) to determine your level of English language proficiency.
[...]