Lindsay Lohan has been ordered to undergo extensive psychotherapy and drug treatment.

The troubled actress - who was discharged from the UCLA Medical Centre on Tuesday (24.08.10) after completing 22 days of treatment - has been given a strict set of conditions she must adhere to by Judge Elden Fox, who is now presiding over her case.

In a hearing yesterday (25.08.10), the judge ordered Lindsay to attend four psychotherapy and two behavioural therapy sessions a week, submit to random drug and alcohol testing twice a week, see a counsellor seven times a week for chemical dependency issues and attend 12-step chemical dependency sessions five times a week.

If the 'Mean Girls' actress fails to comply with any of the conditions, Judge Fox has warned she will face a 30-day jail sentence.

However, once she passes a deadline of November 1, the strict conditions imposed on the actress - who was originally sentenced to 90 days jail and 90 days in rehab for breaching the terms of her probation set for a 2007 driving under the influence (DUI) conviction - will be eased.

The judge said: "If all conditions are met by November 1, she will be allowed unsupervised probation and permitted to live elsewhere, including outside California."

Lindsay's lawyer insisted the star is "serious about her sobriety."

Shawn Chapman Holley said: "She looks forward to proving to the court that she's moving forward in a positive manner."

The actress' lawyer also confirmed Lindsay had decided not to attend the Los Angeles premiere of her new movie Machete last night.

She said: "She thought it was better for her to focus on recovery and not go to something splashy. She's healthy and clear-headed."

The 24-year-old star has also been spotted applying for a new driving licence.

A source revealed: "Lindsay went to the DMV in Santa Monica today. You're not allowed to drive if you are on probation for DUI, but she went to jail for ignoring her rules of probation on DUI, and she's served her time so she can re-apply."