The Election Commission rejected the ministry's proposal to launch its two new schemes in Delhi, Madhya Pradesh, Rajasthan, Chhattisgarh and Mizoram. The new schemes were to be launched from October 5.
The poll body has also directed the ministry not to publicise the two schemes in Delhi and other states.
"The two schemes shall not be implemented in Delhi in view of the Model Code and the publicity of these schemes shall also not be allowed in Delhi," said an EC communication to the Oil Ministry.
The Ministry had sought the EC's nod before launching the schemes in Delhi and other states.
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According to the proposal, cooking gas (LPG) was to be made available at select petrol pumps in metro cities after the ministry allowed sale of 5-kg cylinders at retail outlets.
The proposal was to also launch LPG connection portability, allowing consumers to choose or change cooking gas dealers at the press of a button.
An LPG consumer is attached to a distributor and cannot change his distributor even if he is unhappy with the service.
The LPG portability was launched in Chandigarh on January 11 as a pilot project, before being introduced in other identified cities.