It shall be competent evidence in any civil action brought for damages against any person, firm or corporation regulated by this chapter to prove that such person, firm or corporation has violated any term or provision of this chapter or any regulation promulgated under this chapter where such act or failure to act is proximately related to the injury or loss for which damages are claimed, but proof of any acts or failure to act which may constitute a violation of any term or provision of this chapter or of any regulation promulgated under this chapter shall not constitute prima facie proof of negligence in any such action against the party sought to be charged with damages.