Private law prohibition, the violation of which is associated only with the responsibilities provided for in § 65 of the Commercial Code, it will be applied only on the initiative of the company itself, eventually. Its shareholders, but it is not excluded criminal responsibility.
It is a tool that is provided to partners to protect the interests of the company. For different companies are different prohibitions of competition - for example, LLC only for agents, for public trade company for all partners, etc.
Prohibition of competition in the Commercial Code restricts business and to some extent dependent activity of members of company bodies and allows application of penalties for its violation.