Notwithstanding any provision of any group disability insurance contract or blanket disability insurance contract, benefits shall not be denied thereunder for any psychological service rendered by a holder of a license issued pursuant to chapter
18.83 RCW: PROVIDED, That (1) the service rendered was within the lawful scope of such person's license, and (2) such contract would have provided the benefits for such service if rendered by a holder of a license issued pursuant to chapter
18.71 RCW.