The regulations should more explicitly allow for discontinuing patient shielding as routine practice in accordance with current scientific literature and in consideration of new technology, as referenced in the AAPM position statement found here:

https://www.aapm.org/org/policies/details.asp?id=468

and supporting FAQ document found here:

https://www.aapm.org/org/policies/documents/CARES_FAQs_Patient_Shielding.pdf.