If the employer or carrier pays or tenders payment of compensation without an award pursuant to section
and (b) of this title, and thereafter a controversy develops over the amount of additional compensation, if any, to which the employee may be entitled, the deputy commissioner or Board shall set the matter for an informal conference and following such conference the deputy commissioner or Board shall recommend in writing a disposition of the controversy. If the employer or carrier refuse to accept such written recommendation, within fourteen days after its receipt by them, they shall pay or tender to the employee in writing the additional compensation, if any, to which they believe the employee is entitled. If the employee refuses to accept such payment or tender of compensation, and thereafter utilizes the services of an attorney at law, and if the compensation thereafter awarded is greater than the amount paid or tendered by the employer or carrier, a reasonable attorney’s fee based solely upon the difference between the amount awarded and the amount tendered or paid shall be awarded in addition to the amount of compensation. The foregoing sentence shall not apply if the controversy relates to degree or length of disability, and if the employer or carrier offers to submit the case for evaluation by physicians employed or selected by the Secretary, as authorized in section
of this title and offers to tender an amount of compensation based upon the degree or length of disability found by the independent medical report at such time as an evaluation of disability can be made. If the claimant is successful in review proceedings before the Board or court in any such case an award may be made in favor of the claimant and against the employer or carrier for a reasonable attorney’s fee for claimant’s counsel in accord with the above provisions. In all other cases any claim for legal services shall not be assessed against the employer or carrier.