His lawyer Ron Mansfield told APNZ today that he had lodged an application to vacate his client's guilty pleas.
Mr Mansfield said Masters was applying for legal aid but the process had taken longer than expected, because he had to trawl through all the previous court rulings and appearances.
Asked about his client, Mr Mansfield said: "He is fully cooperative, polite and courteous. I am having no trouble getting instructions."
Earlier today Justice Pamela Andrews gave Masters 48 hours to make an application to vacate his guilty plea.
Justice Andrews said that if Masters did not make the application by 4pm on Friday, he would be sentenced in November.
Masters and 43 other members of his gang were arrested in May, 2008 after a police raid which netted several hundred thousand dollars worth of methamphetamine.
Several members of the gang were jailed in 2009 on drugs charges.