CFR › Title 47 › Part 64 › §64.63647 CFR §64.636Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)A default provider freeze prevents a change in an iTRS user's default provider selection unless the iTRS user gives the provider from whom the freeze was requested his or her express consent.(b)Default provider freezes shall be prohibited.