Excerpt from the article:
"Hamid Reza Pahlevani, Head of (Iran's) Civil Aviation Organization, urged the local airlines to order and buy modern planes and facilities. “In order to decrease the average fleet age, we have asked the local airlines to buy new and modern planes.” Hamid Reza Pahlevani told reporters. Pahlevani also urged airlines to pay their debts to Iran’s National Oil Company."
The Iranian CAO should be applauded for encouraging Iran's airlines to update, given the significant improvement in passenger safety this would bring. Unfortunately however, in reality this is much easier said than done, especially in light of the ever increasing sanctions.
It just doesn't seem feasible for them to obtain "new and modern planes" given the current political tensions and sanctions that exist. I'm pretty sure that if Iran's airlines could have bought new Airbus or Boeing airplanes they would have surely done so already. It appears that the CAO is asking them to do the impossible - in light of the sanctions. Of course they could always commit to buying Ukrainian/Russian AC, but the Iranians seem to have a strong preference for Airbus and Boeing.