21—64.89 (163) Accredited herd. No herd shall be classed as an accredited herd, in which tuberculosis has been found by the application of the test as referred to in 64.63(163), until such herd has been successfully subjected to two consecutive tests with tuberculin applied at intervals of not less than six months, the first interval dating from the time of removal of the tuberculous animals from the herd.
This rule is intended to implement Iowa Code section 165.12.