; (2) be offered by an authorized employee of the Postal Service at any other location, such as the home of an individual being verified; (3) include, subject to the consent of the individual being verified, concurrent enrollment with or verification for multiple customers or other entities for which the Postal Service provides identity proofing services, including public agencies; (4) include multiple levels of assurance, such as the assurance levels described in Special Publication 800–63, Digital Identity Guidelines , published by the National Institute of Standards and Technology; (5) include enrollment in or creation of a digital account for use in digitally authenticating the individual in the future, including to third parties; and (6) include a mechanism whereby any entity may sponsor an individual by paying the cost of the identity verification of the individual. (e) Fees The Postal Service shall charge fees for the identity proofing and identity-related services offered under this section under such structure and at such rates as the Postal Service determines appropriate to cover at least 100 percent of the costs attributable to the provision of those services. (f) Postal Regulatory Commission regulations The Postal Regulatory Commission may issue such regulations as the Commission determines necessary to— (1) ensure that the identity proofing and identity-related services under this section would provide a net contribution to the Postal Service, defined as revenue that covers at least 100 percent of the costs attributable to the provision of those services in each year; and (2) ensure that offering identity proofing and identity-related services under this section does not conflict with the core mission of the Postal Service. (g) Limitations Nothing in this section shall be construed to— (1) authorize the Postal Service to offer any service to the private sector, other than identity proofing and identity-related services, that is not otherwise authorized by law