(2) The owner of a construction site is liable to any contractor who is an employer at the site for costs incurred by the contractor if:
(a) Representatives of the Director of the Department of Consumer and Business Services decide that ORS 654.150 applies to the construction project, and the contract documents did not designate which party to the contract for the project was responsible for complying with ORS 654.150 and the rules adopted pursuant thereto; and
(b) The contractor incurs additional costs in complying with ORS 654.150.
(3) In addition to being liable for the amount of the additional costs incurred, as provided by subsection (2) of this section, the owner is liable for interest on the amount at the rate of one percent per month from the date such contractor makes demand upon the owner to reimburse the contractor for such costs until the contractor is paid. [1977 c.129 §2]