In February, Yashini had applied for a sub-inspector role, but her candidacy was rejected by the Tamil Nadu Uniformed Services Recruitment Board because no third gender category was listed on the application forms.
Far from keeping her chin up, Yashini then brought her case to Madras High Court which has just made a positive verdict, asking that the position is filled to Yashini and that the forms be changed to include this missing third gender category.
"The social impact of such recruitment cannot be lost sight of, as it would give strength to the case of transgenders," the judges said in their ruling.
"Yashini must reach the finish line, and not be stopped and disqualified in the middle."
There are already three transgender police constables in Tamil Nadu but Yashini will be the first officer both in the region and across the country.
"I’m excited. It's a new beginning for the entire transgender community," she told NDTV.