(a) Subject to the requirements of this part, a State agency with jurisdiction under State law may participate in investigative and surveillance activities concerning Federal railroad safety laws and regulations by entering into an agreement under §212.105 for the exercise of specified authority.

(b) Subject to requirements of this part, a State agency with jurisdiction under State law may participate in investigative and surveillance activities with respect to particular rules, regulations, orders or standards issued under the regulatory authority of the Federal Railroad Safety Act of 1970 by filing an annual certification under §212.107.