OBS_VALUE: With the declaration of 2004 that was extended in 2009 and further extended in 2014, ACCC found mobile network operators to have a monopoly over the voice and SMS termination services on their network. The declaration expired on 30 June 2019 and was replaced by the ACCC's final report with which it extended the declaration of voice MTAS for a further five years. The ACCC has concluded that there are no effective substitutes for voice calls for which voice MTAS is an essential input for reasons relating to both functionality and consumer behaviour. The ACCC has nonetheless decided to remove the declaration of SMS MTAS (due to increased competition from over the top messaging services like iMessage and WhatsApp). The variation to the service description to remove the declaration of SMS MTAS was scheduled to come into effect after a six month transition period. See also: https://www.accc.gov.au/media-release/regulation-of-wholesale-mobile-voice-services-should-continue