The rate of hamen was unstable, but the loss of more than 50 percent was approved as hamen in 1727, then the criteria was changed to more than 40 percent in 1728 and more than 30 percent in 1734.
破免率は定まらなかったが、享保12年に5分以上の損毛は破免とし、13年4月に4分以上、19年に3分以上と改めた。