§ 111.320. What requirements apply to laboratory methods for testing and examination?
46 words·~1 min read·
/us/cfr/t21/s§ 111.320·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
(a)You must verify that the laboratory examination and testing methodologies are appropriate for their intended use.
(b)You must identify and use an appropriate scientifically valid method for each established specification for which testing or examination is required to determine whether the specification is met.