The Bombay High Court on Wednesday reserved its order on the dispute between the Income Tax Department and Vodafone over capital gains tax to the tune of around $2 billion, arising out of the telecom major's acquisition of Hutchisson-Essar in 2006. The division bench of Justices S Radhakrishnan and Anand Nirgude has asked Vodafone and the Income Tax Department to submit their written arguments in the matter within one week.