Apart from slapping penalty, the fair trade regulator has asked the 12 entities to "cease and desist" from indulging in anti-competitive practices.
These entities are suppliers of CN containers -- those with disc required for making 81 mm bomb -- to three ordnance factories spread across Maharashtra.
In its ruling, finalised after nearly two years of ordering a detailed investigation into the matter, the Commission has imposed a total penalty of little over Rs 3 crore on the 12 entities.
They were supplying the material to Ammunition Factory, Khadki, Ordnance Factory Dehu Road, both in Pune; and Ordnance Factory, Chandrapur. The 81 mm disc with container is an essential raw material needed for producing 81 mm bomb.
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"... In the absence of any such an anti-competitive agreement, the bidders would have not only competed against each other (on price) but may have also undercut each other to secure the contract which would have resulted in lower prices for the consumers," it said.
The Commission noted that the three ordnance factories, have also been deprived of the benefits that could have accrued to them on account of the competitive bidding process.
There is no evidence to show that the agreement amongst the opposite parties resulted in improvement in production or distribution of goods or promotion of scientific, technical and economic developments, the order noted.
The matter was taken up on suo-motu basis. In May 2013, the regulator had ordered a detailed probe by its investigation arm Director General, who submitted the report on August 2014.