Iran press/Asia: Mawlawi Abdul Hakim added: "The Islamic Emirate will adopt the constitution of the former King Mohammad Zahir Shah's tenure for a temporary period."
But anything in the text that contradicted Sharia law and the principles of the Islamic Emirate would be dismissed, he noted.
Nearly six decades ago, before the world's superpowers intervened in the country, Afghanistan enjoyed a short period of the constitutional monarchy during the reign of Mohammad Zahir Shah.
The king ratified the constitution a year after coming to power in 1963, leading to nearly a decade of parliamentary democracy before being overthrown in 1973.
The 1964 constitution gave women the right to vote for the first time and opened the doors for their increased participation in politics.
The group, which swept to power in mid-August, had vowed a softer and more inclusive approach than during their brutal 1996 to 2001 rule, when women were largely excluded from public life, including work and education.
After suffering through the Soviet occupation in the 1980s, followed by civil war and then harsh Taliban rule, Afghanistan adopted a constitution after the US-led 2001 invasion.
But it opted not to restore the old monarchy, approving a new text in 2004 that envisaged a presidency and enshrined equal rights for women.
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