; (C) ensure that each inmate understands the status of the inmate in the special management unit program and how the inmate may progress through the program; and (D) further reduce the minimum and maximum number of months an inmate may spend in a special management unit if the Director determines such reductions are appropriate after evaluations are performed under subparagraph (B). (7) Administrative maximum facilities The Director shall— (A) limit segregation in an administrative maximum facility to situations in which such segregation is necessary to— (i) implement special administrative measures, as directed by the Attorney General; or (ii) house an inmate who poses an ongoing significant and serious threat to the safety of other inmates, staff, or the public that cannot be addressed through alternative housing; and (B) issue final approval of referral of any inmate who poses an ongoing significant and serious threat for placement in an Administrative Maximum facility, including the United States Penitentiary Administrative Maximum in Florence, Colorado. (8) Right to review placement in solitary confinement The Director shall ensure that each inmate placed in solitary confinement has access to— (A) written notice thoroughly detailing the basis for placement or continued placement in solitary confinement not later than 6 hours after the beginning of such placement, including— (i) thorough documentation explaining why such confinement is permissible and necessary under paragraph (1); and (ii) if an exception under paragraph (2)(A), (3)(D), (4)(A), (4)(B), (5)(A), or (5)(B) is used to justify placement in solitary confinement or under paragraph (1) to justify increased restrictive conditions in solitary confinement, thorough documentation explaining why such an exception applied; (B) a timely, thorough, and continuous review process that— (i) occurs within not less than 3 days of placement in solitary confinement, and thereafter at least— (I) on a weekly basis for inmates in special housing units