(1) It is unlawful for any employee of a mass transit district, transportation district or municipal bus system to strike or recognize a picket line of a labor organization while in the performance of official duties.
(2) As used in this section:
(a) “Mass transit district” means a mass transit district established under ORS 267.010 to 267.394.
(b) “Transportation district” means a transportation district established under ORS 267.510 to 267.650.