In an interaction with journalists late on Tuesday night, he also said that the ministry is thinking of giving conditioned and limited approval to dealing with banned firms, and a ban has been lifted to get spare parts for Tatra trucks.
"Representatives from defence firms are already allowed in the Defence Procurement Policy... the problem is it does not say what is not acceptable," Parrikar said.
"Changes will be made to the DPP, representatives will be allowed but commission, or percentage of profit for the deals will not be allowed. The representative's remuneration shall be declared by the company," he said.
Parrikar added that a draft of the changed policy is ready and a final draft will be ready in another 8-10 days. It will then go through further procedures before going to the union cabinet.
"The process shall be completed in another one and a half months," said Parrikar, but noted that those agents who have been banned by the ministry will not be permitted under the new arrangement.
He also said that banned firms can be conditionally allowed.
"Based on merit and necessity, one can think of lifting the ban to a reasonable level," he said.
Parrikar said the state-run Bharat Earth Movers Limited (BEML) has been allowed to supplying spare parts for Tatra trucks, as long as it does not deal with the British subsidiary of the company, which was banned following irregularities in its deal with BEML.
"Limited NoC (no objection certificate) has been given to BEML because we need Tatra trucks," he said.