45 CFR §170.555

1. (a)ONC-ACBs may certify Health IT Module(s) to a newer version of certain identified minimum standards specified at subpart B of this part, unless the Secretary prohibits the use of a newer version for certification.
2. (b)Applicability of a newer version of a minimum standard.
   1. (1)ONC-ACBs are not required to certify Health IT Module(s) according to newer versions of standards adopted and named in subpart B of this part, unless:
      1. (i)The National Coordinator approves a newer version for use in certification and a health IT developer voluntarily elects to seek certification of its health IT in accordance with § 170.405(b)(9) or update its certified health IT to the newer version in accordance with § 170.405(b)(8); or
      2. (ii)The new version is incorporated by reference in § 170.299.
   2. (2)A certified Complete EHR or certified Health IT Module may be upgraded to comply with newer versions of standards identified as minimum standards in subpart B of this part without adversely affecting its certification status, unless the Secretary prohibits the use of a newer version for certification.