The 30-year-old Folau, a devout Christian, was issued a code of conduct breach notice on Monday (April 15) following an investigation by RA's integrity unit and had 48 hours to respond.
Raelene Castle, chief executive of Rugby Australia, said Folau had been warned in the past about his social media posts.
Folau will now face a Code of Conduct hearing, the date of which is still to be confirmed.
The NSW Rugby Union last Friday stood Folau down from all player duties with the Waratahs, to whom his younger brother John is contracted.
Head coach Michael Cheika has said he will no longer pick Folau for the Wallabies because his divisive views do not fit into the team's inclusive culture.
Declaring on Monday that Folau was in breach of contract, Castle said: "Following the events of a year ago, Israel was warned formally and repeatedly about the expectations of him as a player for the Wallabies and NSW Waratahs with regards to social media use and he has failed to meet those obligations".
A former club and country team-mate of Israel Folau has issued a stinging put-down following the full-back's decision to challenge his attempted sacking by Rugby Australia. Hell awaits you. Repent!
At stake for Folau is a multi-million euro four year contract and he could have grounds for a legal claim on the grounds of religious discrimination.
RA said Folau's request for a code of conduct hearing was "not an unexpected outcome".
While Folau found support from Wilson he was getting none from Wallabies vice-captain Will Genia.
Folau said he was living "for God now" and he would quit rugby if God wants him too, during an interview with the Sydney Morning Herald earlier this week.
"He's got to realise that there are other people within that group, both at the Waratahs and Wallabies, that have certain beliefs as well, that very much conflict with what he's come out and said and done", Genia added.
And Genia acknowledges that it would be hard for Folau's team-mates to welcome him back.
Although everyone has the right to have his view, you then have to understand the consequences when you express the view that can be very, very hurtful to a lot of people.
"I'm probably resigned to the fact I won't play with him again".