Class determination
(b) Class determination. (1) When the manufacturer makes an initial determination of defect, serious defect, or imminent safety hazard, the manufacturer must also make a good-faith determination of the class that includes each manufactured home in which the same defect, serious defect, or imminent safety hazard exists or likely exists. Multiple occurrences of defects may be considered the same defect if they have the same cause, are related to a specific workstation description, or are related to the same failure to follow the manufacturer's approved quality assurance manual. Good faith may be used as a defense to the imposition of a penalty, but does not relieve the manufacturer of its responsibilities for notification or correction under this subpart I. The manufacturer must make this class determination not later than 20 days after making a determination of defect, serious defect, or imminent safety hazard. (2) Paragraph (c) of this section sets out methods for a manufacturer to use in determining the class of manufactured homes. If the manufacturer can identify the precise manufactured homes affected by the defect, serious defect, or imminent safety hazard, the class of manufactured homes may include only those manufactured homes actually affected by the same defect, serious defect, or imminent safety hazard. The manufacturer is also permitted to exclude from the class those manufactured homes for which the manufacturer has information that indicates the homes were not affected by the same cause. If it is not possible to identify the precise manufactured homes affected, the class must include every manufactured home in the group of homes that is identifiable, since the same defect, serious defect, or imminent safety hazard exists or likely exists in some homes in that group of manufactured homes. (3) For purposes related to this section, a defect, a serious defect, or an imminent safety hazard likely exists in a manufactured home if the cause of the defect, serious defect, or imminent safety hazard is such that the same defect, serious defect, or imminent safety hazard would likely have been introduced systematically into more than one manufactured home. Indications that the defect, serious defect, or imminent safety hazard would likely have been introduced systematically may include, but are not limited to, complaints that can be traced to the same faulty design or faulty construction, problems known to exist in supplies of components or parts, information related to the performance of a particular employee or use of a particular process, and information signaling a failure to follow quality control procedures with respect to a particular aspect of the manufactured home. (4) If the manufacturer must determine the class of homes pursuant to paragraph (b) of this section, the manufacturer must obtain from the IPIA, and the IPIA must provide, either: (i) The IPIA's written concurrence on the methods used by the manufacturer to identify the homes that should be included in the class of homes; or (ii) The IPIA's written statement explaining why it believes the manufacturer's methods for determining the class of homes were inappropriate or inadequate.