Thanks for answers !

I have one more problem. I can't seem to start Orontid Empire Reforms.

If I understand Hayasdan Reforms Manual I need to "reform" the provinces by tiers, first tier is Persis (Persepolis) and Elymais (Suza)?

1. Have Pan-Caucasus Reformes
2. Capture Persis (Persepolis) and Elymais (Suza) provnices as reformes start in these two provinces (Tier I)?
3. Have Type III government in these two provinces
4. Build Royal Administration in Persis (Persepolis) and Elymais (Suza).

I have problem, because I can't build Royal Administration in Persepolis, it just isn't available. I built ist in Suza though.
I also built "The Conquerer comes..." in both provinces, still no "Expansion Precursor" available though...