When any poultry at an official establishment is suspected of having been treated with or exposed to any substance that may impart a biological residue that would make their edible tissues adulterated, they shall, at the option of the operator of the establishment, be processed at the establishment and the carcasses and all parts thereof retained under “State of California Rejected/Retained” tags, pending final disposition in accordance with section 1252 of these regulations, and the provisions in Article 14; or they shall be slaughtered at the establishment and disposed of in a manner satisfactory to the inspector. Alternatively, such poultry may be returned to the grower, if further holding is likely to result in their not being adulterated by reason of any residue. The Department will notify the appropriate state or federal agencies of such action. To aid in determining the amount of residue present in the poultry, officials of the Department may permit the slaughter of any such poultry for the purpose of collecting tissues for analysis of the residue.