12. "Engineering practice" means any professional service or creative work requiring engineering education, training and experience and the application of special knowledge of the mathematical, physical and engineering sciences to such professional services or creative work as consultation, research investigation, evaluation, planning, surveying as defined in paragraph 22, subdivisions (d) and (e), design, location, development, and review of construction for conformance with contract documents and design, in connection with any public or private utility, structure, building, machine, equipment, process, work or project. Such services and work include plans and designs relating to the location, development, mining and treatment of ore and other minerals. A person shall be deemed to be practicing or offering to practice engineering if the person practices any branch of the profession of engineering, or by verbal claim, sign, advertisement, letterhead, card or any other manner represents that the person is a professional engineer, or is able to perform or does perform any engineering service or other service recognized by educational authorities as engineering. A person employed on a full-time basis as an engineer by an employer engaged in the business of developing, mining and treating ores and other minerals shall not be deemed to be practicing engineering for the purposes of this chapter if the person engages in the practice of engineering exclusively for and as an employee of such employer and does not represent that the person is available and is not represented as being available to perform any engineering services for persons other than the person's employer.