If a Foreign Service officer or a Foreign Service Reserve officer who is eligible to submit a request under subsection (a) of this section submits a written request for appointment to the Senior Foreign Service to the Secretary more than 120 days after February 15, 1981, and before the end of the 3-year period beginning on February 15, 1981, the Secretary (in the case of a Foreign Service Reserve officer with limited tenure) may grant a limited appointment to, or (in the case of a Foreign Service officer or Foreign Service Reserve officer with unlimited tenure) may recommend to the President a career appointment of, the requesting officer to the appropriate class established under section
3962 of this title, subject to the conditions specified in subsection (d) of this section and such other conditions as the Secretary may prescribe consistent with the provisions of subchapter VI of this chapter relating to promotion into the Senior Foreign Service.