A bilateral agreement is between two countries regarding the operation of their international airlines, and the airline must comply with that agreement.

• Type of aircraft

• Make of aircraft

• No. Of cities served by the airline

• No. Of passenger

• No. Of flights

• Permission to import duty-free spares and supplies for aircraft maintenance.

The government, for the freedom of aircraft subject to certain restrictions, has framed the following rules:

• To fly over the territory of another country.

• To land in the territory of another country for technical reasons.

• From one's own country to a foreign country.

• From a foreign country to one's own country.

• From one foreign country to another foreign country.

• From one foreign country to another foreign country via one's own country.