Given the lack of co-operation from Iran, Thatcher, kept apprised of the situation by Whitelaw, determined that British law would be applied to the embassy, despite the Vienna Convention, under which the embassy is considered Iranian soil.
Mengingat kurangnya kerjasama dari Iran, Thatcher—yang terus diberitahu tentang situasi dengan Whitelaw—menentukan bahwa hukum Inggris akan diterapkan ke kedutaan, meskipun Konvensi Wina, di mana kedutaan dianggap wilayah Iran.