(1) Within the entirety of counties in which the DSA is located all sexually intact female cattle and domestic bison that are four months of age or older as of January 1 of any year must be Official Calfhood Vaccinates (OCV).

(a) Female cattle or domestic bison that are not OCV eligible may become Official Adult Vaccinates (AV).

(b) Variances or exceptions to requirements will be considered on an individual basis by the administrator.