RDA Central West has posted an announcement on their website about the skilled visa nominations for 489 visa. They have confirmed that they will post the new occupation list by 5th August 2019.
RDA Central West has requested applicants not be submit any registrations until the new list has been published and check the new occupation list before submitting the registration on 5th August.
RDACW has also guided that the registrations for the occupations not on the list will not be accepted.
Source: https://rdacentralwest.org.au/visas/visa-489/