Schapelle Corby is set to have her jail term cut further as lawyers for the convicted drug smuggler continue to work on a possible parole bid.

The governor of Bali's Kerobokan jail, Gusti Ngurah Wiratna, has confirmed that Corby has been recommended for a six-month sentence cut set to be announced as part of Indonesian Independence Day celebrations on August 17.

The Bali Nine's Renae Lawrence is also in line for a six-month reduction in her sentence.

The 35-year-old from Newcastle is serving 20 years for her role in a failed 2005 plot to smuggle more than 8kg of heroin from Bali to Australia. She has already been granted more than two years in remissions.

"Both women are receiving maximum remission because both are deserving," Wiratna told AAP.

Corby has been eligible to apply for parole since last August but is yet to lodge an application after the Indonesian government introduced a new set of strict conditions for prisoners convicted of serious crimes including drug trafficking.

The 36-year-old's lawyer, Iskandar Nawing, said he was still waiting for word from immigration department officials who are yet to provide a letter clarifying her immigration status, and which is needed before she applies for parole.

"We're still waiting for green light from the immigration officials. When they've given signal that it's okay, then we'll go ahead," he said.

The regulations signed off on in April means there are a number of other hurdles that Corby may have to clear before gaining parole, including agreeing to become a so-called "justice collaborator", as well as admitting guilt and showing remorse.

Corby, who was caught in 2004 attempting to import 4.1 kilograms of marijuana into Bali in her bodyboard bag, was sentenced to 20 years in jail but had that term slashed by five years by Indonesian President Susilo Bambang Yudhoyono.

If Corby fails to win parole, the latest sentence cut if confirmed would mean the earliest she could walk free from Kerobokan jail is mid-2015, so long as she continues to win the maximum eight months per year in remissions.