Payment of vocational rehabilitation benefits pursuant to § 30H by the Trsut Fund. If the insurer refuses to provide the vocational rehabilitation program developed by the office, the office shall provide it to the employee with trust fund money pursuant to § 65. The Commissioner shall provide by rule for efficient procedures and quality controls in the office's management of such programs, which may be carried out under contract by private rehabilitation service providers. If upon completion of the program, the office determines that the program was successful and returned the employee to suitable employment, it shall assess the insurer no less than twice the cost incurred by the office and such assessment shall be paid into said trust fund.