The text of this additional law No. 299 can be read in "A Collection of the Historical Material on the History of Law System in Medieval Ages," and the addressee is OTA Minbu-daifu, (meaning the under secretary of Monchujo, MIYOSHI no Yasutsura) so it would have been handed to the Miyoshi clan (the Ota clan).
この幕府追加法299の本文が『中世法制史料集』で知られるが、そちらでは宛先に大田民部大夫殿とあり、このとき問注所の執事であった三善康連のことであり、三善氏（大田氏）に伝えられたのだろう。