Its a bit vague like the rest of the law but the way its written co-ops don't really fit the law.
"69.51A.010
Definitions.

The definitions in this section apply throughout this chapter unless the context clearly requires otherwise.

(1) "Designated provider" means a person who:

(a) Is eighteen years of age or older;

(b) Has been designated in writing by a patient to serve as a designated provider under this chapter;

(c) Is prohibited from consuming marijuana obtained for the personal, medical use of the patient for whom the individual is acting as designated provider; and

(d) Is the designated provider to only one patient at any one time."