After difficult negotiations, the concession was granted to D'Arcy by Mozaffaredin shah on 28 May 1901 and Kitabgi was appointed Imperial Commissioner by the Persian government to look after the interests of Persia.
After a lengthy discussion, D'Arcy received permission from Mozaffaredin shah on 28 May 1901. As part of this agreement, Kitabgi was designated as Imperial Commissioner by the Persian government to protect Persia's interests.