Stanley Hou, 35, is accused of manufacturing a large quantity of controlled precursors for the manufacture and sale of drugs.

He is yet to enter a plea.

Hou was arrested last month when police raided a Hume warehouse after receiving reports of hazardous materials and fumes coming from the building.

Police seized 2.5 tonnes of precursor chemicals and equipment they allege were used to make ecstasy and methylamphetamine MDMA.

The haul was described by police as the largest seizure of MDMA or ecstasy in ACT history, estimating the chemicals could have produced 400kg of the drug, or more than four million ecstasy pills, with an estimated street value of between $8.4 million and $15.1 million.

Hou was bailed in August under strict bail conditions, including he pay a $5000 bond, live in Franklin, not use a mobile phone or any device with internet access, surrender his passports, observe a curfew at night, and he not visit Hume.

But those conditions were eased when Hou appeared in the ACT Magistrates Court on Tuesday.

Magistrate Bernadette Boss removed the conditions the defendant observe a curfew, not visit Hume, and allowed him to possess a mobile.

Dr Boss varied the defendant's bail to reside in Lyneham, report to police on a daily basis.

His lawyer, Kamy Saeedi, said many of the original bail conditions were no longer necessary now police had completed the early stages of their investigation.

Mr Saeedi also told the court investigating officers had foreshadowed laying more charges against his client.

The prosecution also requested and were granted an extension to prepare the brief.

The case will now reappear in court again in the new year.