If change of circumstances warrants an increase or rearrangement of compensation, like application shall be made therefor. Where the application has been granted, compensation and other benefits if in order shall be allowed for periods of time up to sixty days prior to the receipt of such application.
[ 1977 ex.s. c 199 § 1; 1961 c 23 § 51.28.040. Prior: 1927 c 310 § 6, part; 1921 c 182 § 7, part; 1911 c 74 § 12, part; RRS § 7686, part.]