ISS is an income support payment that may be paid to eligible war widows and widowers under the VEA and persons receiving wholly dependent partners' compensation under the MRCA, and who satisfy the means tests. It is an indexed rate, increased twice-yearly in March and September in line with changes to the cost of living and/or average wages. Income Support Supplement (ISS) legislation commenced on 20 March 1995. It is a payment created to replace the ceiling rate income support age, carer, wife and disability support pensions, paid to war widows/widowers by Centrelink.