Following a hearing upon a motion of the employer, the employee, or the commission, if the commission deems a permanently disabled employee, after the period of recovery, is receptive to and in need of retraining in another field, skill or vocation in order to restore his earning capacity, the commission may authorize or order such retraining and during the period of retraining or any extension thereof, the employer shall continue to pay the disabled employee, as a subsistence benefit, temporary total or temporary partial disability benefits as the case may be. The period of retraining shall be fixed by the commission but shall not exceed fifty-two (52) weeks unless the commission, following application and hearing, deems it advisable to extend the period of retraining, in which case the increased period shall not exceed fifty-two (52) weeks. An employer and employee may mutually agree to a retraining program without the necessity of a hearing before the commission.