In response to an RTI application filed by The Indian Express, the Home Ministry has stated: "On an average, between 7,500 to 9,000 orders for interception of telephones are issued by the Central government per month." According to the Indian Telegraph Rules, the Union Home Secretary is the authority to grant approval for interception of telephones.

Under Section 5(2) of the Indian Telegraph Act, telephonic conversations can be intercepted/monitored inter alia on grounds of sovereignty and integrity of India, security of the State, friendly relations with foreign states or public order or for preventing incitement to commission of an offence.

Once cleared, the interceptions can be continued for two months and may be renewed twice. In any case, the interception cannot be in force more than 180 days.

The Home Ministry, in its response to the RTI application, did not divulge details saying that as per rules, records pertaining to these interceptions are destroyed after six months, unless these are, or likely to be, required for functional requirements. The agencies which get clearance for interception of telephones include law enforcement agencies functioning under the Central government.

Telephone interceptions are cleared as per Rule 419-A of the Indian Telegraph Rules, last amended in 2007. But these are not the only phones which are being intercepted. In fact, state governments have similar powers to intercept phones. In their case, requests for interception by law enforcing agencies are cleared by the Secretary of Home Department.