 The North American Piedmontese Association ( NAPA ) was organized in September 2000 , and is the official breed registry for North American Piedmontese cattle . It is a member @-@ based , nonprofit breed registry headquartered in Washington , U.S. , and the first cattle breed registry with mandatory registration requirements based on the presence of the Piedmontese @-@ specific myostatin allele mutation . There are different categories of registration and <unk> within the registry . Only homozygous animals ( 2 copy ) can be registered , therefore breed true , and are eligible for registration in either the <unk> ( based on pedigree record ) , or Naturalean divisions . 
