1. (1) A defendant personally, or, where permissible, by counsel may orally enter:

   1. (a) A plea of guilty; or
   2. (b) A plea of not guilty; or
   3. (c) A plea of nolo contendere (no contest) with the consent of the court; or
   4. (d) A plea of not guilty by reason of insanity, in which event a not guilty plea may also be entered.

Source: L. 72: R&RE, p. 221, § 1. C.R.S. 1963: § 39-7-205.