Allotment of pay, etc. War risk insurance, allowance refund, hearings on H. R. 13273 [to amend act to authorize establishment of Bureau of War Risk Insurance in Treasury Department, and act in amendment thereto approved Oct. 6, 1917, so that when award of allotment or family allowance is modified no reimbursement shall be required for moneys previously paid on award], Dec. 14, 1918.