Knowledge and compliance with rules required
49 C.F.R. § 390.3(e) requires:
(e)(1) Every employer shall be knowledgeable of and comply with all regulations contained in this subchapter which are applicable to that motor carrier's operations.
(e) (2) Every driver and employee shall be instructed regarding, and shall comply with, all applicable regulations contained in this subchapter.
(e)(3) All motor vehicle equipment and accessories required by this subchapter shall be maintained in compliance with all applicable performance and design criteria set forth in this subchapter.