Samantha Lewin was in a car driving on the Geelong-Bacchus Marsh Road when police pulled the car over for speeding.

They performed identification checks on all three occupants, and found they all had significant drug-related priors - they searched the car, and found a small black bag with empty deal bags, a set of scales, $1450 in cash, and a 1.57 gram bag of methamphetamine. Lewin said it was hers, and she was arrested - she admitted to possession, but denied trafficking.

At a bail application hearing at the Ballarat Magistrates' Court on Monday, police said the woman was on bail for serious drug possession offences and other charges at the time, and was due to return to court in August.

Police opposed bail because of the risk of repeat offending, and her history of contravening court orders. "She's not showing a lot of respect for the contract of bail," police prosecutor Senior Constable Jack Fletcher said.

Her defence lawyer called Lewin's mother to the stand, where she stated she would make sure Lewin would follow bail conditions. She promised to phone police if Lewin broke any curfew.

Lewin's lawyer said she was facing her first time in adult custody, following repeated experiences in the youth justice system.

Instead, the court could impose strict conditions that included drug rehabilitation and counselling.

"She's very aware of the consequences of breaching bail now," her lawyer told the court. "The amount of drugs found is at the lower end, and the admissions relate to possession only."

Magistrate Cynthia Toose said she took Lewin's age into account when granting bail as part of compelling reasons, as well as the difficult conditions faced by prisoners on remand during the pandemic crisis.

Lewin agreed to reside at her mother's house in Darley, and abide by a curfew.

She will be assessed for the Court Integrated Services Program as early as possible over the phone.

Ms Toose warned Lewin further offences under the bail act would not be tolerated, and she would be "unlikely" to be bailed again.

"I expect compliance," she said.

Lewin will return to court on August 14.

In a separate case, a man pleaded guilty to stealing a wallet from a car in Redan and attempting to use the stolen prescription to buy Endone at a Ballarat chemist.

Benjamin Smith appeared via video link - he was also charged with failing to report to the authorities when he changed his address and got a new mobile phone number.

The court was also told he was arrested after breaking into a boat moored at Docklands.

Mr Smith did not have legal representation - despite being told by Ms Toose he could adjourn to June 16, he insisted his case be heard immediately.

The videolink cut out as the prosecution ended its summary - he will return to court on June 17.