Final answer:
A departure from AATB standards that is pre-approved by the AATB Board of Governors prior to implementation is called a waiver.
Step-by-step explanation:
A departure from AATB standards that is pre-approved by the AATB Board of Governors prior to implementation is called a waiver. A waiver is a document that grants temporary or permanent relief from certain rules or requirements. In the context of AATB (American Association of Tissue Banks) standards, a waiver allows a deviation from the established guidelines, but only after it has been officially approved by the Board of Governors.
This process ensures that any deviations from the standards are carefully reviewed and authorized. A variance allows for an organization to deviate from the established standards in a controlled and approved manner, typically to adopt new practices or technologies that are not yet covered by existing standards but are deemed acceptable by the governing body.