If the State Board of Agriculture or any authorized agent thereof determines any animal or livestock in any area is or might be infected with any foreign animal disease, a quarantine may be declared by the Board. The quarantine shall show the area quarantined and the conditions of the quarantine. Notice of the quarantine shall be given in person by an authorized agent, by certified mail, by a sign or signs posted in or around the quarantined area, or by publication in a legal newspaper of general circulation in one or more counties in which the area may be situated. It shall be illegal to remove any sign or notice posted to a quarantined area or premises unless removed by the State Veterinarian or an authorized agent.