As used in this article, the following terms have the following meanings:
(a) “Board” or “joint powers board” means the governing board of a joint exercise of powers agency established pursuant to Article 5.2 (commencing with Section 14072), Article 5.4 (commencing with Section 14074), or Article 5.6 (commencing with Section 14076) for the purpose of assuming administrative responsibility for intercity passenger rail service within the respective corridor.
(b) “Secretary” means the Secretary of Transportation.