Explanation:

 India proposed a SAARC Motor Vehicle Agreement during the 18th SAARC summit in Kathmandu in November 2014. Due to objections from Pakistan, an agreement could not be reached. India instead pursued a similar motor vehicle agreement with the BBIN. The BBIN Motor Vehicles Agreement (MVA) was signed on 15 June 2015 at the BBIN transport ministers meeting in Thimpu, Bhutan. The agreement will permit the member states to ply their vehicles in each other's territory for transportation of cargo and passengers, including third country transport and personal vehicles. Each vehicle would require an electronic permit to enter another country's territory, and border security arrangement between nations' borders will also remain. Cargo vehicles will be able enter any of the four nations without the need for trans-shipment of goods from one country's truck to another's at the border. Under the system, cargo vehicles are tracked electronically, permits are issued online and sent electronically to all land ports. Vehicles are fitted with an electronic seal that alerts regulators every time the container door is opened. This agreement is yet under consideration and has not become operational. Bhutan's Parlaiment refused to ratify it due to their peculiar dependence on India and non-requirement of any land corridor with any other South Asian country.