Evidentiary requirements.
Evidentiary requirements. An individual who alleges that he did not render substantial services in any month, or months, shall submit detailed information about the operation of the trades or businesses, including the individual's activities in connection therewith. When requested to do so by the Administration, the individual shall also submit such additional statements, information, and other evidence as the Administration may consider necessary for a proper determination of whether the individual rendered substantial services in self-employment. Failure of the individual to submit the requested statements, information, and other evidence is a sufficient basis for a determination that the individual rendered substantial services in self-employment during the period in question.