Section 242.105 - Schedule for implementation(a) By September 1, 2012, each railroad shall:(1) In writing, designate as certified conductors all persons authorized by the railroad to perform the duties of a conductor as of January 1, 2012; and(2) Issue a certificate that complies with § 242.207 to each person that it designates.(b) After September 1, 2012, each railroad shall:(1) In writing, designate as a certified conductor any person who has been authorized by the railroad to perform the duties of a conductor between January 1, 2012 and the pertinent date in paragraph (d) or (e) of this section; and(2) Issue a certificate that complies with § 242.207 to each person that it designates.(c) No railroad shall permit or require a person, designated as a certified conductor under the provisions of paragraph (a) or (b) of this section, to perform service as a certified conductor for more than a 36-month period beginning on the pertinent date for compliance with the mandatory procedures for testing and evaluation set forth in the applicable provisions of paragraph (d) or (e) of this section unless that person has been certified in accordance with procedures that comply with subpart B of this part. (1) Except as provided in paragraph (c)(3) of this section, a person who has been designated as a certified conductor under the provisions of paragraph (a) or (b) of this section and who is eligible to receive a retirement pension in accordance with the terms of an applicable agreement or in accordance with the terms of the Railroad Retirement Act (45 U.S.C. 231 ) within 36 months from the pertinent date for compliance with the mandatory procedures for testing and evaluation set forth in the applicable provisions of paragraph (d) or (e) of this section, may request, in writing, that a railroad not recertify that person, pursuant to subpart B of this part, until 36 months from the pertinent date for compliance with the mandatory procedures for testing and evaluation set forth in the applicable provisions of paragraph (d) or (e) of this section.(2) Upon receipt of a written request pursuant to paragraph (c)(1) of this section, a railroad may wait to recertify the person making the request until the end of the 36-month period described in paragraph (c) of this section. If a railroad grants any request, it must grant the request of all eligible persons to every extent possible.(3) A person who is subject to recertification under part 240 of this chapter may not make a request pursuant to paragraph (c)(1) of this section.(d) After December 1, 2012, no Class I railroad (including the National Railroad Passenger Corporation), Class II railroad, or railroad providing commuter service shall initially certify or recertify a person as a conductor unless that person has been tested and evaluated in accordance with procedures that comply with subpart B of this part and issued a certificate that complies with § 242.207 .(e) After April 1, 2013, no Class III railroad (including a switching and terminal or other railroad not otherwise classified) shall initially certify or recertify a person as a conductor unless that person has been tested and evaluated in accordance with procedures that comply with subpart B of this part and issued a certificate that complies with § 242.207 .(f) After the applicable dates specified in paragraphs (d) and (e) of this section, no person shall serve as a conductor in any type of service and no railroad shall require or permit any person to serve as a conductor in any type of service unless that person has been tested and evaluated in accordance with procedures that comply with subpart B of this part and issued a certificate that complies with § 242.207 .76 FR 69841, Nov. 9, 2011, as amended at 77 FR 6491, Feb. 8, 2012