Which Asoka Pillars Inscription talks about taxation?

Rummindei Pillar Inscription says that The Beloved of the Gods, the king Piyadassi, when he had been consecrated twenty years, came in person find referenced the place where Buddha Sakyamuni was born. He caused a stone enclosure to be made and a stone pillar to be erected. As the Lord was born here in the village of Lumbini, he has exempted it from tax, and fixed its contribution [i.e. of grain] at one-eigth.