C.R.S. § 8-70-137: Employment does not include - organization exempt from income tax.

"Employment" does not include services performed in any calendar quarter in the employ of any organization exempt from income tax under section 501 (a) of the "Internal Revenue Code", other than an organization described in section 401 (a), or under section 521 of said code, if the remuneration for such service is less than fifty dollars.