The commission, successor to the commission, other private carrier or self-insured employer, whichever is applicable, under special circumstances and when it is considered advisable, may commute periodical benefits to one or more lump-sum payments. Upon the application of any claimant who has received an award of partial or total disability, who is not a citizen of the United States and desires to reside permanently beyond the territorial limits of the United States, or upon the application of an alien dependent of a deceased employee with respect of whose death award of compensation has been made, the dependent residing in the territorial limits of the United States at the time of the decedent's death, and desiring to reside permanently beyond the territorial limits of the United States, the commission, successor to the commission, other private carrier or self-insured employer, whichever is applicable, may commute into one lump-sum payment the periodical payments to which the claimant or dependent would be entitled, but at the rate of one-half the amount that would be payable to a citizen of the United States under like circumstances. The lump-sum payment at the rate specified in this section discharges all liability with respect to the award, but in no event shall the award be paid until the claimant or dependent has actually arrived and domiciled himself or herself outside the territorial limits of the United States, except a sufficient portion of the award to pay transportation and other necessary expenses.