With Pakistan refusing to grant overflight to Prime Minister Narendra Modi's plane for his visit to Saudi Arabia, India has taken up the issue with the International Civil Aviation Organization, news wire IANS reported. PM Modi is travelling to Saudi Arabia on a two-day official visit. On Sunday, Pakistan rejected a request by India to let Prime Minister Narendra Modi use its airspace. In September too, Pakistan refused to let Modi use its airspace for his travel to the US. For all VVIP visits the foreign countries are required to be informed of the use of their airspace. According to the International Civil Aviation Organization charter, denial of airspace cannot be done by any country, except in the event of war.