In the summers, when snow cleared over the Dorah Pass and Lowari Pass, goods of various kind were brought over these passes to Chitral. Traders carting merchandise into and out of the Chitral, as well as those in transit, were historically required to pay a tax known as octroi. The collection of octori was regulated. By 1919, octori was fetching the state earnings of almost 4,000 Indian rupees annually. This increased in subsequent years and between 1932 and 1936, for instance, the average annual income from octroi stood at 19,680 rupees. State officials collecting the tax were required to issue printed receipts to merchants, this measure disallowed corruption.