The official PDF download is available for purchase from CLSI and its authorized resellers. Below is a table of official sources where you can legally purchase and download the PDF, with direct links.
Exempt media are commercially prepared batches that have an extremely low failure rate (historically less than 0.1%). Laboratories are not required to perform performance QC (growth/inhibition testing) on these media, provided the manufacturer certifies compliance with CLSI M22-A3. Examples of typically exempt media include: Sheep Blood Agar (SBA) MacConkey Agar (MAC) clsi m22a3 pdf link
: A detailed template from the American Society for Microbiology for building an Individualized Quality Control Plan, which cites M22-A3 standards. The official PDF download is available for purchase
To obtain a legitimate, fully compliant copy of the document, use the following authorized channels: 1. The Official CLSI Online Shop Laboratories are not required to perform performance QC
While US laboratories under CLIA regulations have transitioned toward as of 2016, M22-A3 remains a global gold standard. It is frequently used as the scientific evidence base for risk assessments when building an IQCP.