(a) Individuals not subject to the requirements of this part may participate voluntarily. To receive a certificate of completion as a voluntary participant, individuals must complete the PTSCTP curriculum within three (3) years of their enrollment. Voluntary participants are not required to complete recertification. FTA will not recertify voluntary participants.

(b) If a voluntary participant has received a PTSCTP certificate of completion and is subsequently designated by an SSOA or rail transit agency as a PTSCTP participant, the individual will need to complete required recertification training within two (2) years of designation.