Before Khamenei, many failed poets who achieved political power tried to dictate to poets, among them the Qajar Nassereddin Shah and the Chinese despot Mao Zedong. They failed because poetry has a magic genius that defies attempts at definition let alone dictation. Poetry is like love, Rilke wrote to his imaginary young poet, everyone knows what it is but no one can agree on a definition. Khamenei, aged 77, no longer fits the image of Rilke's young poet. Nevertheless, maybe for his next birthday someone could give him a copy of Rilke's magical essay.
When the Ayatollah Dictates Poetry, Ashraq Al-Awsat (Jul 11, 2015).