(a) In this chapter the “practice of law” means the preparation of a pleading or other document incident to an action or special proceeding or the management of the action or proceeding on behalf of a client before a judge in court as well as a service rendered out of court, including the giving of advice or the rendering of any service requiring the use of legal skill or knowledge, such as preparing a will, contract, or other instrument, the legal effect of which under the facts and conclusions involved must be carefully determined.
(b) The definition in this section is not exclusive and does not deprive the judicial branch of the power and authority under both this chapter and the adjudicated cases to determine whether other services and acts not enumerated may constitute the practice of law.

(c) In this chapter, the “practice of law” does not include the design, creation, publication, distribution, display, or sale, including publication, distribution, display, or sale by means of an Internet web site, of written materials, books, forms, computer software, or similar products if the products clearly and conspicuously state that the products are not a substitute for the advice of an attorney. This subsection does not authorize the use of the products or similar media in violation of Chapter 83 and does not affect the applicability or enforceability of that chapter.