[2] She sat on a number of enquiry commissions, including one into the death of 'Biscuit Baron' Rajan Pillai, and was also a part of the three-member bench of the Justice Verma Committee that was established to overhaul India's rape laws in the aftermath of the infamous 2012 Delhi gang-rape case.

She was a member of the 15th Law Commission of India from 1997 to 2000, and was responsible for the amendments to the Hindu Succession Act that gave equal rights to daughters in joint family property.

[4] After her father's death, the family struggled financially, but Leila's mother managed to educate her in Loreto Convent, Darjeeling.

In an interview, she said that she picked law for the simple reason that it did not require attending classes, which was a priority since she had an infant at the time.

In the same year, she launched her Supreme Court practice, handling tax matters, writ petitions and constitutional civil and criminal appeals.

She was a member of the 15th Law Commission of India from 1997 to 2000, during which time she spearheaded the campaign to give daughters inheritance rights over ancestral property in the Hindu Succession Act (1956).

[9] Justice Seth was also a part of various enquiry commissions, one of which was responsible for studying the effects of the television serial, Shaktiman (about a popular superhero) on children.

[10] She was also the single-member of the Justice Leila Seth Commission which enquired into the custodial death of businessman Rajan Pillai, or popularly known as "Biscuit Baron".

[12][13] Justice Leila Seth died after suffering a cardio-respiratory attack on the night of 5 May 2017 at her residence in Noida, aged 86.