; and (B) take into account the resource requirements of United States Probation and Pretrial Services as a result of the transfer of Bureau of Prisons prisoners to prerelease custody. (7) Assistance United States Probation and Pretrial Services shall, to the greatest extent practicable, offer assistance to any prisoner not under its supervision during prerelease custody under this subsection. (8) Mentoring services Any prerelease custody into which a prisoner is placed under this subsection may not include a condition prohibiting the prisoner from receiving mentoring services from a person who provided such services to the prisoner while the prisoner was incarcerated, except that the warden of the facility at which the prisoner was incarcerated may waive the requirement under this paragraph if the warden finds that the provision of such services would pose a significant security risk to the prisoner, persons who provide such services, or any other person. The warden shall provide written notice of any such waiver to the person providing mentoring services and to the prisoner. (9) Time limits inapplicable The time limits under subsections (b) and (c) shall not apply to prerelease custody under this subsection. (h) Alien prisoners subject to deportation If a prisoner who is placed in prerelease custody is an alien whose deportation was ordered as a condition of such prerelease custody or who is subject to a detainer filed by United States Immigration and Customs Enforcement for the purposes of determining the alien’s deportability, United States Immigration and Customs Enforcement shall take custody of the alien upon the alien’s transfer to prerelease custody. . (2) Effective date The amendments made by this subsection shall take effect beginning on the date that the Attorney General completes and releases the risk and needs assessment system under subchapter D of chapter 229 of title 18, United States Code. 103. GAO Report Not later than 2 years after the Director of the Bureau of Prisons implements the risk and