Both schemes have a standard 3 year cycle for certification.

For NDIS, if you have had a verification audit, you will need to be audited at 3 years

For NDIS, if you have had a provisional audit, you will need to be audited within 3 months of commencing service provision and possibly again at midterm (18 months)

For NDIS, if you have had a full certification or recertification, you will need to be audited at 18 months or midterm

For ACIS, if you have had a full certification or recertification, you will need to be audited at 12 months or you an apply for special consideration to move to 18 month surveillance