Section 170.300 - Applicability(a) The certification criteria adopted in this subpart apply to the testing and certification of Health IT Modules.(b) When a certification criterion refers to two or more standards as alternatives, use of at least one of the alternative standards will be considered compliant.(c) Health Modules are not required to be compliant with certification criteria or capabilities specified within a certification criterion that are designated as optional.(d) In § 170.315 , all certification criteria and all capabilities specified within a certification criterion have general applicability (i.e., apply to any health care setting) unless designated as "inpatient setting only" or "ambulatory setting only."