Explanation:

The Suez Canal, is an artificial sea-level waterway running north to south across the Isthmus of Suez in Egypt to connect the Mediterranean Sea and the Red Sea. The canal separates the African continent from Asia, and it provides the shortest maritime route between Europe and the lands lying around the Indian and western Pacific oceans. It is one of the world's most heavily used shipping lanes.

According to UNCLOS internationally important sea routes like Strait of Malacca, Suez Canal
etc are considered to be International waters and countries cannot charge custom duties on the
vessels passing through them.