(1) Where any sum has been deposited by an employer as compensation payable in respect of an employee whose injury has resulted in death, and in the opinion of the competent authority such sum is insufficient, the competent authority may, by notice in writing stating his reasons, call upon the employer to show cause why he should not make a further deposit within such time as may be stated in the notice.
    (2) If the employer fails to show cause to the satisfaction of the competent authority, the competent authority may make an award determining the total amount payable, and requiring the employer to deposit the deficiency.