Aditi, who has just returned from Turkey after playing in the World Amateur Team Championships, shares the lead with overnight leader Amandeep Drall (74) at 148.
The stage is set for a very close finish at the Golmuri Golf Club as the lead is shared and close behind them are Millie Saroha (75, 75) in third place, just two shots adrift.
Another one shot behind is Raksha Phadke (75, 76), also a member of the National Squad like the top three.
The 14-year-old Aditi, who also leads the Ladies Order of Merit, but is still eligible for Category B, was actually two-under for the day when she came to the 18th tee.
She had earlier bogeyed the par-five seventh but picked up birdies on the 10th and par-three 16th. Then she again bogeyed the par-five 18th, the distance clearly not being to her liking.
Gurbani Singh (76, 77) was fifth at 153, while Nanaki Chadha (73) made up for her lacklustre first day round of 82 with a good round of two-over to move to sixth place at 155.
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This season, Gurbani has won the Usha Southern India Ladies title, while Millie Saroha won the Usha Northern India Ladies title and Aditi is the reigning All India Ladies Amateur champion. So, the competition will be really keen in the final stages of the tournament.
Millie Saroha leads Category A with a total of 150 and Raksha Phadke is right behind her at 151, but in Category, as also combined A-B, Aditi Ashok moved into the lead position at 148.
In Category C, Riya Ahuja maintained the lead with rounds of 83 and 85 and she was followed by Arshia Mahant (89, 88).
The lead was unchanged even in Category D, where Tanishka Kumar (84, 91) led second-placed Vasundhara Tihara (89, 91) by seven shots.