Mo. Code Regs. tit. 8 § 20-3.020
PURPOSE: This rule states the policy of the commission on reviewing awards on grounds of change in condition.
The sole issue in all proceedings under section 287.470, RSMo is whether there has been a substantial change in the employee's condition between the date of the commission's final award and the date of rehearing. On rehearing, the commission will not admit, nor will it consider, any evidence the only purpose of which is to show that the extent or duration of the employee's disability by reason of the condition existing at the time of the final award actually was either more or less in extent or longer or shorter in duration than the commission then found and declared.
8 CSR 20-3.020
*Original authority: 286.060, RSMo 1945, amended 1947, 1980.