(1) It is an unfair labor practice for an employer, individually or in concert with others, to: (a) Interfere with, restrain, or coerce his employees in the exercise of the rights guaranteed in section 8-3-106; (b) Initiate, create, dominate, or interfere with the formation or administration of any labor organization or contribute financial support to it; except that an employer shall not be prohibited from reimbursing employees at their prevailing wage rate for time spent conferring with him, nor