"The commission has directed to issue summons for personal appearance to you (Sharma) in pursuance of powers under the provisions of the DCW Act, 1994," the DCW notice said.
Sharma has been asked to appear before the commission on August 20.
DCW had yesterday issued fresh summons to SHO Kashmere Gate regarding the alleged attack on Lamba during an anti-drug drive last week.
Lamba along with the SHO Vijender Singh and DCP North Madhur Verma were summoned to appear before DCW yesterday. While Verma did not come for the meet the SHO was issued a fresh summon for August 20 and was asked to come along with the CCTV footage and status report on action taken in the case.
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Lamba was injured when someone allegedly threw a stone at her during an anti-drug drive there. A video clip later showed her vandalising shops along with some of her supporters.
She had lodged a complaint on the same day with the DCW against Sharma alleging he used foul language against her and threatened her.
While Sharma was not available for his comments on the issue, Lamba hailed the DCW summon saying, " I hope I will get justice".